Algebra Examples

$f (x) = \frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}$

Step 1

Write $f (x) = \frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}$ as an equation.

$y = \frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}$

Step 2

Interchange the variables.

$x = \frac{{(y - 9)}^{\frac{1}{5}} + 5}{4}$

Step 3

Solve for $y$ .

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Step 3.1

Rewrite the equation as $\frac{{(y - 9)}^{\frac{1}{5}} + 5}{4} = x$ .

$\frac{{(y - 9)}^{\frac{1}{5}} + 5}{4} = x$

Step 3.2

Multiply both sides of the equation by $4$ .

$4 \frac{{(y - 9)}^{\frac{1}{5}} + 5}{4} = 4 x$

Step 3.3

Simplify the left side.

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Step 3.3.1

Cancel the common factor of $4$ .

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Step 3.3.1.1

Cancel the common factor.

$4 \frac{{(y - 9)}^{\frac{1}{5}} + 5}{4} = 4 x$

Step 3.3.1.2

Rewrite the expression.

${(y - 9)}^{\frac{1}{5}} + 5 = 4 x$

Step 3.4

Subtract $5$ from both sides of the equation.

${(y - 9)}^{\frac{1}{5}} = 4 x - 5$

Step 3.5

Raise each side of the equation to the power of $5$ to eliminate the fractional exponent on the left side.

${({(y - 9)}^{\frac{1}{5}})}^{5} = {(4 x - 5)}^{5}$

Step 3.6

Simplify the exponent.

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Step 3.6.1

Simplify the left side.

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Step 3.6.1.1

Simplify ${({(y - 9)}^{\frac{1}{5}})}^{5}$ .

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Step 3.6.1.1.1

Multiply the exponents in ${({(y - 9)}^{\frac{1}{5}})}^{5}$ .

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Step 3.6.1.1.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

${(y - 9)}^{\frac{1}{5} \cdot 5} = {(4 x - 5)}^{5}$

Step 3.6.1.1.1.2

Cancel the common factor of $5$ .

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Step 3.6.1.1.1.2.1

Cancel the common factor.

${(y - 9)}^{\frac{1}{5} \cdot 5} = {(4 x - 5)}^{5}$

Step 3.6.1.1.1.2.2

Rewrite the expression.

${(y - 9)}^{1} = {(4 x - 5)}^{5}$

Step 3.6.1.1.2

Simplify.

$y - 9 = {(4 x - 5)}^{5}$

Step 3.6.2

Simplify the right side.

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Step 3.6.2.1

Simplify ${(4 x - 5)}^{5}$ .

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Step 3.6.2.1.1

Use the Binomial Theorem.

$y - 9 = {(4 x)}^{5} + 5 {(4 x)}^{4} \cdot - 5 + 10 {(4 x)}^{3} {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2

Simplify each term.

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Step 3.6.2.1.2.1

Apply the product rule to $4 x$ .

$y - 9 = 4^{5} x^{5} + 5 {(4 x)}^{4} \cdot - 5 + 10 {(4 x)}^{3} {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.2

Raise $4$ to the power of $5$ .

$y - 9 = 1024 x^{5} + 5 {(4 x)}^{4} \cdot - 5 + 10 {(4 x)}^{3} {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.3

Apply the product rule to $4 x$ .

$y - 9 = 1024 x^{5} + 5 (4^{4} x^{4}) \cdot - 5 + 10 {(4 x)}^{3} {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.4

Raise $4$ to the power of $4$ .

$y - 9 = 1024 x^{5} + 5 (256 x^{4}) \cdot - 5 + 10 {(4 x)}^{3} {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.5

Multiply $256$ by $5$ .

$y - 9 = 1024 x^{5} + 1280 x^{4} \cdot - 5 + 10 {(4 x)}^{3} {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.6

Multiply $- 5$ by $1280$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 10 {(4 x)}^{3} {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.7

Apply the product rule to $4 x$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 10 (4^{3} x^{3}) {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.8

Raise $4$ to the power of $3$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 10 (64 x^{3}) {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.9

Multiply $64$ by $10$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 640 x^{3} {(- 5)}^{2} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.10

Raise $- 5$ to the power of $2$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 640 x^{3} \cdot 25 + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.11

Multiply $25$ by $640$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} + 10 {(4 x)}^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.12

Apply the product rule to $4 x$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} + 10 (4^{2} x^{2}) {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.13

Raise $4$ to the power of $2$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} + 10 (16 x^{2}) {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.14

Multiply $16$ by $10$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} + 160 x^{2} {(- 5)}^{3} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.15

Raise $- 5$ to the power of $3$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} + 160 x^{2} \cdot - 125 + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.16

Multiply $- 125$ by $160$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 5 (4 x) {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.17

Multiply $4$ by $5$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 20 x {(- 5)}^{4} + {(- 5)}^{5}$

Step 3.6.2.1.2.18

Raise $- 5$ to the power of $4$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 20 x \cdot 625 + {(- 5)}^{5}$

Step 3.6.2.1.2.19

Multiply $625$ by $20$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x + {(- 5)}^{5}$

Step 3.6.2.1.2.20

Raise $- 5$ to the power of $5$ .

$y - 9 = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3125$

Step 3.7

Move all terms not containing $y$ to the right side of the equation.

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Step 3.7.1

Add $9$ to both sides of the equation.

$y = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3125 + 9$

Step 3.7.2

Add $- 3125$ and $9$ .

$y = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3116$

Step 4

Replace $y$ with $f^{- 1} (x)$ to show the final answer.

$f^{- 1} (x) = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3116$

Step 5

Verify if $f^{- 1} (x) = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3116$ is the inverse of $f (x) = \frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}$ .

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Step 5.1

To verify the inverse, check if $f^{- 1} (f (x)) = x$ and $f (f^{- 1} (x)) = x$ .

Step 5.2

Evaluate $f^{- 1} (f (x))$ .

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Step 5.2.1

Set up the composite result function.

$f^{- 1} (f (x))$

Step 5.2.2

Evaluate $f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})$ by substituting in the value of $f$ into $f^{- 1}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = 1024 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3

Simplify each term.

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Step 5.2.3.1

Apply the product rule to $\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = 1024 (\frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{5}}{4^{5}}) - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.2

Raise $4$ to the power of $5$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = 1024 (\frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{5}}{1024}) - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.3

Cancel the common factor of $1024$ .

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Step 5.2.3.3.1

Cancel the common factor.

Step 5.2.3.3.2

Rewrite the expression.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = {({(x - 9)}^{\frac{1}{5}} + 5)}^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.4

Use the Binomial Theorem.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = {({(x - 9)}^{\frac{1}{5}})}^{5} + 5 {({(x - 9)}^{\frac{1}{5}})}^{4} \cdot 5 + 10 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5^{2} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5

Simplify each term.

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Step 5.2.3.5.1

Multiply the exponents in ${({(x - 9)}^{\frac{1}{5}})}^{5}$ .

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Step 5.2.3.5.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = {(x - 9)}^{\frac{1}{5} \cdot 5} + 5 {({(x - 9)}^{\frac{1}{5}})}^{4} \cdot 5 + 10 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5^{2} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.1.2

Cancel the common factor of $5$ .

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Step 5.2.3.5.1.2.1

Cancel the common factor.

Step 5.2.3.5.1.2.2

Rewrite the expression.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = (x - 9) + 5 {({(x - 9)}^{\frac{1}{5}})}^{4} \cdot 5 + 10 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5^{2} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.2

Simplify.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 5 {({(x - 9)}^{\frac{1}{5}})}^{4} \cdot 5 + 10 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5^{2} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.3

Multiply the exponents in ${({(x - 9)}^{\frac{1}{5}})}^{4}$ .

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Step 5.2.3.5.3.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 5 {(x - 9)}^{\frac{1}{5} \cdot 4} \cdot 5 + 10 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5^{2} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.3.2

Combine $\frac{1}{5}$ and $4$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 5 {(x - 9)}^{\frac{4}{5}} \cdot 5 + 10 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5^{2} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.4

Multiply $5$ by $5$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 10 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5^{2} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.5

Multiply the exponents in ${({(x - 9)}^{\frac{1}{5}})}^{3}$ .

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Step 5.2.3.5.5.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 10 {(x - 9)}^{\frac{1}{5} \cdot 3} \cdot 5^{2} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.5.2

Combine $\frac{1}{5}$ and $3$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 10 {(x - 9)}^{\frac{3}{5}} \cdot 5^{2} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.6

Raise $5$ to the power of $2$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 10 {(x - 9)}^{\frac{3}{5}} \cdot 25 + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.7

Multiply $25$ by $10$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 10 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.8

Multiply the exponents in ${({(x - 9)}^{\frac{1}{5}})}^{2}$ .

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Step 5.2.3.5.8.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 10 {(x - 9)}^{\frac{1}{5} \cdot 2} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.8.2

Combine $\frac{1}{5}$ and $2$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 10 {(x - 9)}^{\frac{2}{5}} \cdot 5^{3} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.9

Raise $5$ to the power of $3$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 10 {(x - 9)}^{\frac{2}{5}} \cdot 125 + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.10

Multiply $125$ by $10$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 5 {(x - 9)}^{\frac{1}{5}} \cdot 5^{4} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.11

Multiply $5$ by $5^{4}$ by adding the exponents.

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Step 5.2.3.5.11.1

Move $5^{4}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 5^{4} \cdot (5 {(x - 9)}^{\frac{1}{5}}) + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.11.2

Multiply $5^{4}$ by $5$ .

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Step 5.2.3.5.11.2.1

Raise $5$ to the power of $1$ .

Step 5.2.3.5.11.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 5^{4 + 1} {(x - 9)}^{\frac{1}{5}} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.11.3

Add $4$ and $1$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 5^{5} {(x - 9)}^{\frac{1}{5}} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.12

Raise $5$ to the power of $5$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 5^{5} - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.5.13

Raise $5$ to the power of $5$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9 + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3125 - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.6

Add $- 9$ and $3125$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 6400 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.7

Apply the product rule to $\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 6400 \frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{4}}{4^{4}} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.8

Raise $4$ to the power of $4$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 6400 \frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{4}}{256} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.9

Cancel the common factor of $256$ .

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Step 5.2.3.9.1

Factor $256$ out of $- 6400$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 + 256 (- 25) (\frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{4}}{256}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.9.2

Cancel the common factor.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 + 256 \cdot (- 25 \frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{4}}{256}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.9.3

Rewrite the expression.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {({(x - 9)}^{\frac{1}{5}} + 5)}^{4} + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.10

Use the Binomial Theorem.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({({(x - 9)}^{\frac{1}{5}})}^{4} + 4 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5 + 6 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{2} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11

Simplify each term.

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Step 5.2.3.11.1

Multiply the exponents in ${({(x - 9)}^{\frac{1}{5}})}^{4}$ .

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Step 5.2.3.11.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{1}{5} \cdot 4} + 4 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5 + 6 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{2} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.1.2

Combine $\frac{1}{5}$ and $4$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 4 {({(x - 9)}^{\frac{1}{5}})}^{3} \cdot 5 + 6 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{2} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.2

Multiply the exponents in ${({(x - 9)}^{\frac{1}{5}})}^{3}$ .

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Step 5.2.3.11.2.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 4 {(x - 9)}^{\frac{1}{5} \cdot 3} \cdot 5 + 6 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{2} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.2.2

Combine $\frac{1}{5}$ and $3$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 4 {(x - 9)}^{\frac{3}{5}} \cdot 5 + 6 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{2} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.3

Multiply $5$ by $4$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 20 {(x - 9)}^{\frac{3}{5}} + 6 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5^{2} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.4

Multiply the exponents in ${({(x - 9)}^{\frac{1}{5}})}^{2}$ .

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Step 5.2.3.11.4.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 20 {(x - 9)}^{\frac{3}{5}} + 6 {(x - 9)}^{\frac{1}{5} \cdot 2} \cdot 5^{2} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.4.2

Combine $\frac{1}{5}$ and $2$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 20 {(x - 9)}^{\frac{3}{5}} + 6 {(x - 9)}^{\frac{2}{5}} \cdot 5^{2} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.5

Raise $5$ to the power of $2$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 20 {(x - 9)}^{\frac{3}{5}} + 6 {(x - 9)}^{\frac{2}{5}} \cdot 25 + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.6

Multiply $25$ by $6$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 20 {(x - 9)}^{\frac{3}{5}} + 150 {(x - 9)}^{\frac{2}{5}} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 5^{3} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.7

Raise $5$ to the power of $3$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 20 {(x - 9)}^{\frac{3}{5}} + 150 {(x - 9)}^{\frac{2}{5}} + 4 {(x - 9)}^{\frac{1}{5}} \cdot 125 + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.8

Multiply $125$ by $4$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 20 {(x - 9)}^{\frac{3}{5}} + 150 {(x - 9)}^{\frac{2}{5}} + 500 {(x - 9)}^{\frac{1}{5}} + 5^{4}) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.11.9

Raise $5$ to the power of $4$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 ({(x - 9)}^{\frac{4}{5}} + 20 {(x - 9)}^{\frac{3}{5}} + 150 {(x - 9)}^{\frac{2}{5}} + 500 {(x - 9)}^{\frac{1}{5}} + 625) + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.12

Apply the distributive property.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 25 (20 {(x - 9)}^{\frac{3}{5}}) - 25 (150 {(x - 9)}^{\frac{2}{5}}) - 25 (500 {(x - 9)}^{\frac{1}{5}}) - 25 \cdot 625 + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.13

Simplify.

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Step 5.2.3.13.1

Multiply $20$ by $- 25$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 25 (150 {(x - 9)}^{\frac{2}{5}}) - 25 (500 {(x - 9)}^{\frac{1}{5}}) - 25 \cdot 625 + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.13.2

Multiply $150$ by $- 25$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 25 (500 {(x - 9)}^{\frac{1}{5}}) - 25 \cdot 625 + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.13.3

Multiply $500$ by $- 25$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 25 \cdot 625 + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.13.4

Multiply $- 25$ by $625$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 16000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.14

Apply the product rule to $\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 16000 (\frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{3}}{4^{3}}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.15

Raise $4$ to the power of $3$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 16000 (\frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{3}}{64}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.16

Cancel the common factor of $64$ .

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Step 5.2.3.16.1

Factor $64$ out of $16000$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 64 (250) (\frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{3}}{64}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.16.2

Cancel the common factor.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 64 \cdot (250 (\frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{3}}{64})) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.16.3

Rewrite the expression.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {({(x - 9)}^{\frac{1}{5}} + 5)}^{3} - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.17

Use the Binomial Theorem.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 ({({(x - 9)}^{\frac{1}{5}})}^{3} + 3 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5 + 3 {(x - 9)}^{\frac{1}{5}} \cdot 5^{2} + 5^{3}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.18

Simplify each term.

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Step 5.2.3.18.1

Multiply the exponents in ${({(x - 9)}^{\frac{1}{5}})}^{3}$ .

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Step 5.2.3.18.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 ({(x - 9)}^{\frac{1}{5} \cdot 3} + 3 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5 + 3 {(x - 9)}^{\frac{1}{5}} \cdot 5^{2} + 5^{3}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.18.1.2

Combine $\frac{1}{5}$ and $3$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 ({(x - 9)}^{\frac{3}{5}} + 3 {({(x - 9)}^{\frac{1}{5}})}^{2} \cdot 5 + 3 {(x - 9)}^{\frac{1}{5}} \cdot 5^{2} + 5^{3}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.18.2

Multiply the exponents in ${({(x - 9)}^{\frac{1}{5}})}^{2}$ .

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Step 5.2.3.18.2.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 ({(x - 9)}^{\frac{3}{5}} + 3 {(x - 9)}^{\frac{1}{5} \cdot 2} \cdot 5 + 3 {(x - 9)}^{\frac{1}{5}} \cdot 5^{2} + 5^{3}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.18.2.2

Combine $\frac{1}{5}$ and $2$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 ({(x - 9)}^{\frac{3}{5}} + 3 {(x - 9)}^{\frac{2}{5}} \cdot 5 + 3 {(x - 9)}^{\frac{1}{5}} \cdot 5^{2} + 5^{3}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.18.3

Multiply $5$ by $3$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 ({(x - 9)}^{\frac{3}{5}} + 15 {(x - 9)}^{\frac{2}{5}} + 3 {(x - 9)}^{\frac{1}{5}} \cdot 5^{2} + 5^{3}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.18.4

Raise $5$ to the power of $2$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 ({(x - 9)}^{\frac{3}{5}} + 15 {(x - 9)}^{\frac{2}{5}} + 3 {(x - 9)}^{\frac{1}{5}} \cdot 25 + 5^{3}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.18.5

Multiply $25$ by $3$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 ({(x - 9)}^{\frac{3}{5}} + 15 {(x - 9)}^{\frac{2}{5}} + 75 {(x - 9)}^{\frac{1}{5}} + 5^{3}) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.18.6

Raise $5$ to the power of $3$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 ({(x - 9)}^{\frac{3}{5}} + 15 {(x - 9)}^{\frac{2}{5}} + 75 {(x - 9)}^{\frac{1}{5}} + 125) - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.19

Apply the distributive property.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 250 (15 {(x - 9)}^{\frac{2}{5}}) + 250 (75 {(x - 9)}^{\frac{1}{5}}) + 250 \cdot 125 - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.20

Simplify.

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Step 5.2.3.20.1

Multiply $15$ by $250$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 250 (75 {(x - 9)}^{\frac{1}{5}}) + 250 \cdot 125 - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.20.2

Multiply $75$ by $250$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 250 \cdot 125 - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.20.3

Multiply $250$ by $125$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 20000 {(\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.21

Apply the product rule to $\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 20000 \frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{2}}{4^{2}} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.22

Raise $4$ to the power of $2$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 20000 \frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{2}}{16} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.23

Cancel the common factor of $16$ .

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Step 5.2.3.23.1

Factor $16$ out of $- 20000$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 + 16 (- 1250) (\frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{2}}{16}) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.23.2

Cancel the common factor.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 + 16 \cdot (- 1250 \frac{{({(x - 9)}^{\frac{1}{5}} + 5)}^{2}}{16}) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.23.3

Rewrite the expression.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {({(x - 9)}^{\frac{1}{5}} + 5)}^{2} + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.24

Rewrite ${({(x - 9)}^{\frac{1}{5}} + 5)}^{2}$ as $({(x - 9)}^{\frac{1}{5}} + 5) ({(x - 9)}^{\frac{1}{5}} + 5)$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 (({(x - 9)}^{\frac{1}{5}} + 5) ({(x - 9)}^{\frac{1}{5}} + 5)) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.25

Expand $({(x - 9)}^{\frac{1}{5}} + 5) ({(x - 9)}^{\frac{1}{5}} + 5)$ using the FOIL Method.

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Step 5.2.3.25.1

Apply the distributive property.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 ({(x - 9)}^{\frac{1}{5}} ({(x - 9)}^{\frac{1}{5}} + 5) + 5 ({(x - 9)}^{\frac{1}{5}} + 5)) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.25.2

Apply the distributive property.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 ({(x - 9)}^{\frac{1}{5}} {(x - 9)}^{\frac{1}{5}} + {(x - 9)}^{\frac{1}{5}} \cdot 5 + 5 ({(x - 9)}^{\frac{1}{5}} + 5)) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.25.3

Apply the distributive property.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 ({(x - 9)}^{\frac{1}{5}} {(x - 9)}^{\frac{1}{5}} + {(x - 9)}^{\frac{1}{5}} \cdot 5 + 5 {(x - 9)}^{\frac{1}{5}} + 5 \cdot 5) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.26

Simplify and combine like terms.

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Step 5.2.3.26.1

Simplify each term.

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Step 5.2.3.26.1.1

Multiply ${(x - 9)}^{\frac{1}{5}}$ by ${(x - 9)}^{\frac{1}{5}}$ by adding the exponents.

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Step 5.2.3.26.1.1.1

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 ({(x - 9)}^{\frac{1}{5} + \frac{1}{5}} + {(x - 9)}^{\frac{1}{5}} \cdot 5 + 5 {(x - 9)}^{\frac{1}{5}} + 5 \cdot 5) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.26.1.1.2

Combine the numerators over the common denominator.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 ({(x - 9)}^{\frac{1 + 1}{5}} + {(x - 9)}^{\frac{1}{5}} \cdot 5 + 5 {(x - 9)}^{\frac{1}{5}} + 5 \cdot 5) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.26.1.1.3

Add $1$ and $1$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 ({(x - 9)}^{\frac{2}{5}} + {(x - 9)}^{\frac{1}{5}} \cdot 5 + 5 {(x - 9)}^{\frac{1}{5}} + 5 \cdot 5) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.26.1.2

Move $5$ to the left of ${(x - 9)}^{\frac{1}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 ({(x - 9)}^{\frac{2}{5}} + 5 \cdot {(x - 9)}^{\frac{1}{5}} + 5 {(x - 9)}^{\frac{1}{5}} + 5 \cdot 5) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.26.1.3

Multiply $5$ by $5$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 ({(x - 9)}^{\frac{2}{5}} + 5 {(x - 9)}^{\frac{1}{5}} + 5 {(x - 9)}^{\frac{1}{5}} + 25) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.26.2

Add $5 {(x - 9)}^{\frac{1}{5}}$ and $5 {(x - 9)}^{\frac{1}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 ({(x - 9)}^{\frac{2}{5}} + 10 {(x - 9)}^{\frac{1}{5}} + 25) + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.27

Apply the distributive property.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 1250 (10 {(x - 9)}^{\frac{1}{5}}) - 1250 \cdot 25 + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.28

Simplify.

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Step 5.2.3.28.1

Multiply $10$ by $- 1250$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 1250 \cdot 25 + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.28.2

Multiply $- 1250$ by $25$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 12500 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.29

Cancel the common factor of $4$ .

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Step 5.2.3.29.1

Factor $4$ out of $12500$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 4 (3125) (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) - 3116$

Step 5.2.3.29.2

Cancel the common factor.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 4 \cdot (3125 (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4})) - 3116$

Step 5.2.3.29.3

Rewrite the expression.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 ({(x - 9)}^{\frac{1}{5}} + 5) - 3116$

Step 5.2.3.30

Apply the distributive property.

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 {(x - 9)}^{\frac{1}{5}} + 3125 \cdot 5 - 3116$

Step 5.2.3.31

Multiply $3125$ by $5$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$

Step 5.2.4

Simplify by adding terms.

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Step 5.2.4.1

Combine the opposite terms in $x + 25 {(x - 9)}^{\frac{4}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 25 {(x - 9)}^{\frac{4}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$ .

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Step 5.2.4.1.1

Subtract $25 {(x - 9)}^{\frac{4}{5}}$ from $25 {(x - 9)}^{\frac{4}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 + 0 - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$

Step 5.2.4.1.2

Add $x + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116$ and $0$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 3750 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 3750 {(x - 9)}^{\frac{2}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$

Step 5.2.4.1.3

Add $- 3750 {(x - 9)}^{\frac{2}{5}}$ and $3750 {(x - 9)}^{\frac{2}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} + 0 - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$

Step 5.2.4.1.4

Add $x + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}}$ and $0$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 1250 {(x - 9)}^{\frac{2}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 1250 {(x - 9)}^{\frac{2}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$

Step 5.2.4.1.5

Subtract $1250 {(x - 9)}^{\frac{2}{5}}$ from $1250 {(x - 9)}^{\frac{2}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 + 0 - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$

Step 5.2.4.1.6

Add $x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250$ and $0$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 31250 - 12500 {(x - 9)}^{\frac{1}{5}} - 31250 + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$

Step 5.2.4.1.7

Subtract $31250$ from $31250$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} + 0 - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$

Step 5.2.4.1.8

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} - 15625 + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 15625 - 3116$

Step 5.2.4.1.9

Add $- 15625$ and $15625$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 0 - 3116$

Step 5.2.4.1.10

Add $x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$ and $0$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 3116 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} - 3116$

Step 5.2.4.1.11

Subtract $3116$ from $3116$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} + 0 - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$

Step 5.2.4.1.12

Add $x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$ and $0$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 250 {(x - 9)}^{\frac{3}{5}} + 3125 {(x - 9)}^{\frac{1}{5}} - 500 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$

Step 5.2.4.2

Subtract $500 {(x - 9)}^{\frac{3}{5}}$ from $250 {(x - 9)}^{\frac{3}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 3125 {(x - 9)}^{\frac{1}{5}} - 250 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$

Step 5.2.4.3

Combine the opposite terms in $x + 3125 {(x - 9)}^{\frac{1}{5}} - 250 {(x - 9)}^{\frac{3}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 250 {(x - 9)}^{\frac{3}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$ .

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Step 5.2.4.3.1

Add $- 250 {(x - 9)}^{\frac{3}{5}}$ and $250 {(x - 9)}^{\frac{3}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 3125 {(x - 9)}^{\frac{1}{5}} + 0 - 12500 {(x - 9)}^{\frac{1}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$

Step 5.2.4.3.2

Add $x + 3125 {(x - 9)}^{\frac{1}{5}}$ and $0$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 3125 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$

Step 5.2.4.4

Subtract $12500 {(x - 9)}^{\frac{1}{5}}$ from $3125 {(x - 9)}^{\frac{1}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 9375 {(x - 9)}^{\frac{1}{5}} + 18750 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$

Step 5.2.4.5

Add $- 9375 {(x - 9)}^{\frac{1}{5}}$ and $18750 {(x - 9)}^{\frac{1}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 9375 {(x - 9)}^{\frac{1}{5}} - 12500 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$

Step 5.2.4.6

Subtract $12500 {(x - 9)}^{\frac{1}{5}}$ from $9375 {(x - 9)}^{\frac{1}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x - 3125 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$

Step 5.2.4.7

Combine the opposite terms in $x - 3125 {(x - 9)}^{\frac{1}{5}} + 3125 {(x - 9)}^{\frac{1}{5}}$ .

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Step 5.2.4.7.1

Add $- 3125 {(x - 9)}^{\frac{1}{5}}$ and $3125 {(x - 9)}^{\frac{1}{5}}$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x + 0$

Step 5.2.4.7.2

Add $x$ and $0$ .

$f^{- 1} (\frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}) = x$

Step 5.3

Evaluate $f (f^{- 1} (x))$ .

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Step 5.3.1

Set up the composite result function.

$f (f^{- 1} (x))$

Step 5.3.2

Evaluate $f (1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3116)$ by substituting in the value of $f^{- 1}$ into $f$ .

$f (1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3116) = \frac{{((1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3116) - 9)}^{\frac{1}{5}} + 5}{4}$

Step 5.3.3

Subtract $9$ from $- 3116$ .

$f (1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3116) = \frac{{(1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3125)}^{\frac{1}{5}} + 5}{4}$

Step 5.4

Since $f^{- 1} (f (x)) = x$ and $f (f^{- 1} (x)) = x$ , then $f^{- 1} (x) = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3116$ is the inverse of $f (x) = \frac{{(x - 9)}^{\frac{1}{5}} + 5}{4}$ .

$f^{- 1} (x) = 1024 x^{5} - 6400 x^{4} + 16000 x^{3} - 20000 x^{2} + 12500 x - 3116$