Algebra Examples

f (x) = 2 {(x - 6)}^{\frac{1}{3}} + 10

$f (x) = 2 {(x - 6)}^{\frac{1}{3}} + 10$

Step 1

Write

f (x) = 2 {(x - 6)}^{\frac{1}{3}} + 10

$f (x) = 2 {(x - 6)}^{\frac{1}{3}} + 10$ as an equation.

$y = 2 {(x - 6)}^{\frac{1}{3}} + 10$

Step 2

Interchange the variables.

$x = 2 {(y - 6)}^{\frac{1}{3}} + 10$

Step 3

Solve for

$y$ .

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Step 3.1

Rewrite the equation as

$2 {(y - 6)}^{\frac{1}{3}} + 10 = x$ .

$2 {(y - 6)}^{\frac{1}{3}} + 10 = x$

Step 3.2

Subtract

$10$ from both sides of the equation.

$2 {(y - 6)}^{\frac{1}{3}} = x - 10$

Step 3.3

Raise each side of the equation to the power of

$3$ to eliminate the fractional exponent on the left side.

${(2 {(y - 6)}^{\frac{1}{3}})}^{3} = {(x - 10)}^{3}$

Step 3.4

Simplify the exponent.

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Step 3.4.1

Simplify the left side.

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Step 3.4.1.1

Simplify

${(2 {(y - 6)}^{\frac{1}{3}})}^{3}$ .

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Step 3.4.1.1.1

Apply the product rule to

$2 {(y - 6)}^{\frac{1}{3}}$ .

$2^{3} {({(y - 6)}^{\frac{1}{3}})}^{3} = {(x - 10)}^{3}$

Step 3.4.1.1.2

Raise

$2$ to the power of

$3$ .

$8 {({(y - 6)}^{\frac{1}{3}})}^{3} = {(x - 10)}^{3}$

Step 3.4.1.1.3

Multiply the exponents in

${({(y - 6)}^{\frac{1}{3}})}^{3}$ .

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Step 3.4.1.1.3.1

Apply the power rule and multiply exponents,

${(a^{m})}^{n} = a^{m n}$ .

$8 {(y - 6)}^{\frac{1}{3} \cdot 3} = {(x - 10)}^{3}$

Step 3.4.1.1.3.2

Cancel the common factor of

$3$ .

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Step 3.4.1.1.3.2.1

Cancel the common factor.

$8 {(y - 6)}^{\frac{1}{3} \cdot 3} = {(x - 10)}^{3}$

Step 3.4.1.1.3.2.2

Rewrite the expression.

$8 {(y - 6)}^{1} = {(x - 10)}^{3}$

Step 3.4.1.1.4

Simplify.

$8 (y - 6) = {(x - 10)}^{3}$

Step 3.4.1.1.5

Apply the distributive property.

$8 y + 8 \cdot - 6 = {(x - 10)}^{3}$

Step 3.4.1.1.6

Multiply

$8$ by

$- 6$ .

$8 y - 48 = {(x - 10)}^{3}$

Step 3.4.2

Simplify the right side.

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Step 3.4.2.1

Simplify

${(x - 10)}^{3}$ .

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Step 3.4.2.1.1

Use the Binomial Theorem.

$8 y - 48 = x^{3} + 3 x^{2} \cdot - 10 + 3 x {(- 10)}^{2} + {(- 10)}^{3}$

Step 3.4.2.1.2

Simplify each term.

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Step 3.4.2.1.2.1

Multiply

$- 10$ by

$3$ .

$8 y - 48 = x^{3} - 30 x^{2} + 3 x {(- 10)}^{2} + {(- 10)}^{3}$

Step 3.4.2.1.2.2

Raise

$- 10$ to the power of

$2$ .

$8 y - 48 = x^{3} - 30 x^{2} + 3 x \cdot 100 + {(- 10)}^{3}$

Step 3.4.2.1.2.3

Multiply

$100$ by

$3$ .

$8 y - 48 = x^{3} - 30 x^{2} + 300 x + {(- 10)}^{3}$

Step 3.4.2.1.2.4

Raise

$- 10$ to the power of

$3$ .

$8 y - 48 = x^{3} - 30 x^{2} + 300 x - 1000$

Step 3.5

Solve for

$y$ .

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Step 3.5.1

Move all terms not containing

$y$ to the right side of the equation.

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Step 3.5.1.1

Add

$48$ to both sides of the equation.

$8 y = x^{3} - 30 x^{2} + 300 x - 1000 + 48$

Step 3.5.1.2

Add

$- 1000$ and

$48$ .

$8 y = x^{3} - 30 x^{2} + 300 x - 952$

Step 3.5.2

Divide each term in

$8 y = x^{3} - 30 x^{2} + 300 x - 952$ by

$8$ and simplify.

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Step 3.5.2.1

Divide each term in

$8 y = x^{3} - 30 x^{2} + 300 x - 952$ by

$8$ .

$\frac{8 y}{8} = \frac{x^{3}}{8} + \frac{- 30 x^{2}}{8} + \frac{300 x}{8} + \frac{- 952}{8}$

Step 3.5.2.2

Simplify the left side.

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Step 3.5.2.2.1

Cancel the common factor of

$8$ .

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Step 3.5.2.2.1.1

Cancel the common factor.

$\frac{8 y}{8} = \frac{x^{3}}{8} + \frac{- 30 x^{2}}{8} + \frac{300 x}{8} + \frac{- 952}{8}$

Step 3.5.2.2.1.2

Divide

$y$ by

$1$ .

$y = \frac{x^{3}}{8} + \frac{- 30 x^{2}}{8} + \frac{300 x}{8} + \frac{- 952}{8}$

Step 3.5.2.3

Simplify the right side.

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Step 3.5.2.3.1

Simplify each term.

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Step 3.5.2.3.1.1

Cancel the common factor of

$- 30$ and

$8$ .

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Step 3.5.2.3.1.1.1

Factor

$2$ out of

$- 30 x^{2}$ .

$y = \frac{x^{3}}{8} + \frac{2 (- 15 x^{2})}{8} + \frac{300 x}{8} + \frac{- 952}{8}$

Step 3.5.2.3.1.1.2

Cancel the common factors.

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Step 3.5.2.3.1.1.2.1

Factor

$2$ out of

$8$ .

$y = \frac{x^{3}}{8} + \frac{2 (- 15 x^{2})}{2 (4)} + \frac{300 x}{8} + \frac{- 952}{8}$

Step 3.5.2.3.1.1.2.2

Cancel the common factor.

$y = \frac{x^{3}}{8} + \frac{2 (- 15 x^{2})}{2 \cdot 4} + \frac{300 x}{8} + \frac{- 952}{8}$

Step 3.5.2.3.1.1.2.3

Rewrite the expression.

$y = \frac{x^{3}}{8} + \frac{- 15 x^{2}}{4} + \frac{300 x}{8} + \frac{- 952}{8}$

Step 3.5.2.3.1.2

Move the negative in front of the fraction.

$y = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{300 x}{8} + \frac{- 952}{8}$

Step 3.5.2.3.1.3

Cancel the common factor of

$300$ and

$8$ .

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Step 3.5.2.3.1.3.1

Factor

$4$ out of

$300 x$ .

$y = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{4 (75 x)}{8} + \frac{- 952}{8}$

Step 3.5.2.3.1.3.2

Cancel the common factors.

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Step 3.5.2.3.1.3.2.1

Factor

$4$ out of

$8$ .

$y = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{4 (75 x)}{4 (2)} + \frac{- 952}{8}$

Step 3.5.2.3.1.3.2.2

Cancel the common factor.

$y = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{4 (75 x)}{4 \cdot 2} + \frac{- 952}{8}$

Step 3.5.2.3.1.3.2.3

Rewrite the expression.

$y = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} + \frac{- 952}{8}$

Step 3.5.2.3.1.4

Divide

$- 952$ by

$8$ .

$y = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 119$

Step 4

Replace

$y$ with

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

$f^{- 1} (x) = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 119$

Step 5

Verify if

$f^{- 1} (x) = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 119$ is the inverse of

$f (x) = 2 {(x - 6)}^{\frac{1}{3}} + 10$ .

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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

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10)$ by substituting in the value of

$f$ into

$f^{- 1}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = \frac{{(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{3}}{8} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3

Simplify each term.

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Step 5.2.3.1

Simplify the numerator.

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Step 5.2.3.1.1

Factor

$2$ out of

$2 {(x - 6)}^{\frac{1}{3}} + 10$ .

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Step 5.2.3.1.1.1

Factor

$2$ out of

$2 {(x - 6)}^{\frac{1}{3}}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = \frac{{(2 ({(x - 6)}^{\frac{1}{3}}) + 10)}^{3}}{8} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.1.1.2

Factor

$2$ out of

$10$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = \frac{{(2 {(x - 6)}^{\frac{1}{3}} + 2 \cdot 5)}^{3}}{8} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.1.1.3

Factor

$2$ out of

$2 {(x - 6)}^{\frac{1}{3}} + 2 \cdot 5$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = \frac{{(2 ({(x - 6)}^{\frac{1}{3}} + 5))}^{3}}{8} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.1.2

Apply the product rule to

$2 ({(x - 6)}^{\frac{1}{3}} + 5)$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = \frac{2^{3} {({(x - 6)}^{\frac{1}{3}} + 5)}^{3}}{8} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.1.3

Raise

$2$ to the power of

$3$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = \frac{8 {({(x - 6)}^{\frac{1}{3}} + 5)}^{3}}{8} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.2

Cancel the common factor.

Step 5.2.3.3

Divide

${({(x - 6)}^{\frac{1}{3}} + 5)}^{3}$ by

$1$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = {({(x - 6)}^{\frac{1}{3}} + 5)}^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.4

Use the Binomial Theorem.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = {({(x - 6)}^{\frac{1}{3}})}^{3} + 3 {({(x - 6)}^{\frac{1}{3}})}^{2} \cdot 5 + 3 {(x - 6)}^{\frac{1}{3}} \cdot 5^{2} + 5^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.5

Simplify each term.

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Step 5.2.3.5.1

Multiply the exponents in

${({(x - 6)}^{\frac{1}{3}})}^{3}$ .

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Step 5.2.3.5.1.1

Apply the power rule and multiply exponents,

${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = {(x - 6)}^{\frac{1}{3} \cdot 3} + 3 {({(x - 6)}^{\frac{1}{3}})}^{2} \cdot 5 + 3 {(x - 6)}^{\frac{1}{3}} \cdot 5^{2} + 5^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.5.1.2

Cancel the common factor of

$3$ .

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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.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = (x - 6) + 3 {({(x - 6)}^{\frac{1}{3}})}^{2} \cdot 5 + 3 {(x - 6)}^{\frac{1}{3}} \cdot 5^{2} + 5^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.5.2

Simplify.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x - 6 + 3 {({(x - 6)}^{\frac{1}{3}})}^{2} \cdot 5 + 3 {(x - 6)}^{\frac{1}{3}} \cdot 5^{2} + 5^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.5.3

Multiply the exponents in

${({(x - 6)}^{\frac{1}{3}})}^{2}$ .

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Step 5.2.3.5.3.1

Apply the power rule and multiply exponents,

${(a^{m})}^{n} = a^{m n}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x - 6 + 3 {(x - 6)}^{\frac{1}{3} \cdot 2} \cdot 5 + 3 {(x - 6)}^{\frac{1}{3}} \cdot 5^{2} + 5^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.5.3.2

Combine

$\frac{1}{3}$ and

$2$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x - 6 + 3 {(x - 6)}^{\frac{2}{3}} \cdot 5 + 3 {(x - 6)}^{\frac{1}{3}} \cdot 5^{2} + 5^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.5.4

Multiply

$5$ by

$3$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x - 6 + 15 {(x - 6)}^{\frac{2}{3}} + 3 {(x - 6)}^{\frac{1}{3}} \cdot 5^{2} + 5^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.5.5

Raise

$5$ to the power of

$2$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x - 6 + 15 {(x - 6)}^{\frac{2}{3}} + 3 {(x - 6)}^{\frac{1}{3}} \cdot 25 + 5^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.5.6

Multiply

$25$ by

$3$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x - 6 + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 5^{3} - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.5.7

Raise

$5$ to the power of

$3$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x - 6 + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 125 - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.6

Add

$- 6$ and

$125$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.7

Simplify the numerator.

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Step 5.2.3.7.1

Factor

$2$ out of

$2 {(x - 6)}^{\frac{1}{3}} + 10$ .

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Step 5.2.3.7.1.1

Factor

$2$ out of

$2 {(x - 6)}^{\frac{1}{3}}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{15 {(2 ({(x - 6)}^{\frac{1}{3}}) + 10)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.7.1.2

Factor

$2$ out of

$10$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{15 {(2 {(x - 6)}^{\frac{1}{3}} + 2 \cdot 5)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.7.1.3

Factor

$2$ out of

$2 {(x - 6)}^{\frac{1}{3}} + 2 \cdot 5$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{15 {(2 ({(x - 6)}^{\frac{1}{3}} + 5))}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.7.2

Apply the product rule to

$2 ({(x - 6)}^{\frac{1}{3}} + 5)$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{15 \cdot (2^{2} {({(x - 6)}^{\frac{1}{3}} + 5)}^{2})}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.7.3

Raise

$2$ to the power of

$2$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{15 \cdot (4 {({(x - 6)}^{\frac{1}{3}} + 5)}^{2})}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.7.4

Multiply

$15$ by

$4$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{60 {({(x - 6)}^{\frac{1}{3}} + 5)}^{2}}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.8

Factor

$4$ out of

$60 {({(x - 6)}^{\frac{1}{3}} + 5)}^{2}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{4 (15 {({(x - 6)}^{\frac{1}{3}} + 5)}^{2})}{4} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.9

Cancel the common factors.

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Step 5.2.3.9.1

Factor

$4$ out of

$4$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{4 (15 {({(x - 6)}^{\frac{1}{3}} + 5)}^{2})}{4 (1)} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.9.2

Cancel the common factor.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{4 (15 {({(x - 6)}^{\frac{1}{3}} + 5)}^{2})}{4 \cdot 1} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.9.3

Rewrite the expression.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - \frac{15 {({(x - 6)}^{\frac{1}{3}} + 5)}^{2}}{1} + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.9.4

Divide

$15 {({(x - 6)}^{\frac{1}{3}} + 5)}^{2}$ by

$1$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 {({(x - 6)}^{\frac{1}{3}} + 5)}^{2}) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.10

Rewrite

${({(x - 6)}^{\frac{1}{3}} + 5)}^{2}$ as

$({(x - 6)}^{\frac{1}{3}} + 5) ({(x - 6)}^{\frac{1}{3}} + 5)$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 (({(x - 6)}^{\frac{1}{3}} + 5) ({(x - 6)}^{\frac{1}{3}} + 5))) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.11

Expand

$({(x - 6)}^{\frac{1}{3}} + 5) ({(x - 6)}^{\frac{1}{3}} + 5)$ using the FOIL Method.

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Step 5.2.3.11.1

Apply the distributive property.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 ({(x - 6)}^{\frac{1}{3}} ({(x - 6)}^{\frac{1}{3}} + 5) + 5 ({(x - 6)}^{\frac{1}{3}} + 5))) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.11.2

Apply the distributive property.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 ({(x - 6)}^{\frac{1}{3}} {(x - 6)}^{\frac{1}{3}} + {(x - 6)}^{\frac{1}{3}} \cdot 5 + 5 ({(x - 6)}^{\frac{1}{3}} + 5))) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.11.3

Apply the distributive property.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 ({(x - 6)}^{\frac{1}{3}} {(x - 6)}^{\frac{1}{3}} + {(x - 6)}^{\frac{1}{3}} \cdot 5 + 5 {(x - 6)}^{\frac{1}{3}} + 5 \cdot 5)) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.12

Simplify and combine like terms.

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Step 5.2.3.12.1

Simplify each term.

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Step 5.2.3.12.1.1

Multiply

${(x - 6)}^{\frac{1}{3}}$ by

${(x - 6)}^{\frac{1}{3}}$ by adding the exponents.

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Step 5.2.3.12.1.1.1

Use the power rule

$a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 ({(x - 6)}^{\frac{1}{3} + \frac{1}{3}} + {(x - 6)}^{\frac{1}{3}} \cdot 5 + 5 {(x - 6)}^{\frac{1}{3}} + 5 \cdot 5)) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.12.1.1.2

Combine the numerators over the common denominator.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 ({(x - 6)}^{\frac{1 + 1}{3}} + {(x - 6)}^{\frac{1}{3}} \cdot 5 + 5 {(x - 6)}^{\frac{1}{3}} + 5 \cdot 5)) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.12.1.1.3

Add

$1$ and

$1$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 ({(x - 6)}^{\frac{2}{3}} + {(x - 6)}^{\frac{1}{3}} \cdot 5 + 5 {(x - 6)}^{\frac{1}{3}} + 5 \cdot 5)) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.12.1.2

Move

$5$ to the left of

${(x - 6)}^{\frac{1}{3}}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 ({(x - 6)}^{\frac{2}{3}} + 5 \cdot {(x - 6)}^{\frac{1}{3}} + 5 {(x - 6)}^{\frac{1}{3}} + 5 \cdot 5)) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.12.1.3

Multiply

$5$ by

$5$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 ({(x - 6)}^{\frac{2}{3}} + 5 {(x - 6)}^{\frac{1}{3}} + 5 {(x - 6)}^{\frac{1}{3}} + 25)) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.12.2

Add

$5 {(x - 6)}^{\frac{1}{3}}$ and

$5 {(x - 6)}^{\frac{1}{3}}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 ({(x - 6)}^{\frac{2}{3}} + 10 {(x - 6)}^{\frac{1}{3}} + 25)) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.13

Apply the distributive property.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 {(x - 6)}^{\frac{2}{3}} + 15 (10 {(x - 6)}^{\frac{1}{3}}) + 15 \cdot 25) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.14

Simplify.

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Step 5.2.3.14.1

Multiply

$10$ by

$15$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 {(x - 6)}^{\frac{2}{3}} + 150 {(x - 6)}^{\frac{1}{3}} + 15 \cdot 25) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.14.2

Multiply

$15$ by

$25$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 {(x - 6)}^{\frac{2}{3}} + 150 {(x - 6)}^{\frac{1}{3}} + 375) + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.15

Apply the distributive property.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - (15 {(x - 6)}^{\frac{2}{3}}) - (150 {(x - 6)}^{\frac{1}{3}}) - 1 \cdot 375 + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.16

Simplify.

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Step 5.2.3.16.1

Multiply

$15$ by

$- 1$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 15 {(x - 6)}^{\frac{2}{3}} - (150 {(x - 6)}^{\frac{1}{3}}) - 1 \cdot 375 + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.16.2

Multiply

$150$ by

$- 1$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 15 {(x - 6)}^{\frac{2}{3}} - 150 {(x - 6)}^{\frac{1}{3}} - 1 \cdot 375 + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.16.3

Multiply

$- 1$ by

$375$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 15 {(x - 6)}^{\frac{2}{3}} - 150 {(x - 6)}^{\frac{1}{3}} - 375 + \frac{75 (2 {(x - 6)}^{\frac{1}{3}} + 10)}{2} - 119$

Step 5.2.3.17

Factor

$2$ out of

$75 (2 {(x - 6)}^{\frac{1}{3}} + 10)$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 15 {(x - 6)}^{\frac{2}{3}} - 150 {(x - 6)}^{\frac{1}{3}} - 375 + \frac{2 (75 ({(x - 6)}^{\frac{1}{3}} + 5))}{2} - 119$

Step 5.2.3.18

Cancel the common factors.

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Step 5.2.3.18.1

Factor

$2$ out of

$2$ .

Step 5.2.3.18.2

Cancel the common factor.

Step 5.2.3.18.3

Rewrite the expression.

Step 5.2.3.18.4

Divide

$75 ({(x - 6)}^{\frac{1}{3}} + 5)$ by

$1$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 15 {(x - 6)}^{\frac{2}{3}} - 150 {(x - 6)}^{\frac{1}{3}} - 375 + 75 ({(x - 6)}^{\frac{1}{3}} + 5) - 119$

Step 5.2.3.19

Apply the distributive property.

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 15 {(x - 6)}^{\frac{2}{3}} - 150 {(x - 6)}^{\frac{1}{3}} - 375 + 75 {(x - 6)}^{\frac{1}{3}} + 75 \cdot 5 - 119$

Step 5.2.3.20

Multiply

$75$ by

$5$ .

Step 5.2.4

Simplify by adding terms.

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Step 5.2.4.1

Combine the opposite terms in

$x + 15 {(x - 6)}^{\frac{2}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 15 {(x - 6)}^{\frac{2}{3}} - 150 {(x - 6)}^{\frac{1}{3}} - 375 + 75 {(x - 6)}^{\frac{1}{3}} + 375 - 119$ .

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Step 5.2.4.1.1

Subtract

$15 {(x - 6)}^{\frac{2}{3}}$ from

$15 {(x - 6)}^{\frac{2}{3}}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 75 {(x - 6)}^{\frac{1}{3}} + 119 + 0 - 150 {(x - 6)}^{\frac{1}{3}} - 375 + 75 {(x - 6)}^{\frac{1}{3}} + 375 - 119$

Step 5.2.4.1.2

Add

$x + 75 {(x - 6)}^{\frac{1}{3}} + 119$ and

$0$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 150 {(x - 6)}^{\frac{1}{3}} - 375 + 75 {(x - 6)}^{\frac{1}{3}} + 375 - 119$

Step 5.2.4.1.3

Add

$- 375$ and

$375$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 150 {(x - 6)}^{\frac{1}{3}} + 75 {(x - 6)}^{\frac{1}{3}} + 0 - 119$

Step 5.2.4.1.4

Add

$x + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 150 {(x - 6)}^{\frac{1}{3}} + 75 {(x - 6)}^{\frac{1}{3}}$ and

$0$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 75 {(x - 6)}^{\frac{1}{3}} + 119 - 150 {(x - 6)}^{\frac{1}{3}} + 75 {(x - 6)}^{\frac{1}{3}} - 119$

Step 5.2.4.1.5

Subtract

$119$ from

$119$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 75 {(x - 6)}^{\frac{1}{3}} + 0 - 150 {(x - 6)}^{\frac{1}{3}} + 75 {(x - 6)}^{\frac{1}{3}}$

Step 5.2.4.1.6

Add

$x + 75 {(x - 6)}^{\frac{1}{3}}$ and

$0$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 75 {(x - 6)}^{\frac{1}{3}} - 150 {(x - 6)}^{\frac{1}{3}} + 75 {(x - 6)}^{\frac{1}{3}}$

Step 5.2.4.2

Subtract

$150 {(x - 6)}^{\frac{1}{3}}$ from

$75 {(x - 6)}^{\frac{1}{3}}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x - 75 {(x - 6)}^{\frac{1}{3}} + 75 {(x - 6)}^{\frac{1}{3}}$

Step 5.2.4.3

Combine the opposite terms in

$x - 75 {(x - 6)}^{\frac{1}{3}} + 75 {(x - 6)}^{\frac{1}{3}}$ .

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Step 5.2.4.3.1

Add

$- 75 {(x - 6)}^{\frac{1}{3}}$ and

$75 {(x - 6)}^{\frac{1}{3}}$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x + 0$

Step 5.2.4.3.2

Add

$x$ and

$0$ .

$f^{- 1} (2 {(x - 6)}^{\frac{1}{3}} + 10) = x$

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

$f (\frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 119)$ by substituting in the value of

$f^{- 1}$ into

$f$ .

$f (\frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 119) = 2 {((\frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 119) - 6)}^{\frac{1}{3}} + 10$

Step 5.3.3

Subtract

$6$ from

$- 119$ .

$f (\frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 119) = 2 {(\frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 125)}^{\frac{1}{3}} + 10$

Step 5.4

Since

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

$f (f^{- 1} (x)) = x$ , then

$f^{- 1} (x) = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 119$ is the inverse of

$f (x) = 2 {(x - 6)}^{\frac{1}{3}} + 10$ .

$f^{- 1} (x) = \frac{x^{3}}{8} - \frac{15 x^{2}}{4} + \frac{75 x}{2} - 119$