Precalculus Examples

$\log_{a} ({(\frac{5 x^{2} \sqrt[3]{1 - 4 x}}{7 {(x + 1)}^{2}})}^{\frac{3}{2}})$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt[3]{1 - 4 x}$ as ${(1 - 4 x)}^{\frac{1}{3}}$ .

$\log_{a} ({(\frac{5 x^{2} {(1 - 4 x)}^{\frac{1}{3}}}{7 {(x + 1)}^{2}})}^{\frac{3}{2}})$

Step 2

Expand $\log_{a} ({(\frac{5 x^{2} {(1 - 4 x)}^{\frac{1}{3}}}{7 {(x + 1)}^{2}})}^{\frac{3}{2}})$ by moving $\frac{3}{2}$ outside the logarithm.

$\frac{3}{2} \log_{a} (\frac{5 x^{2} {(1 - 4 x)}^{\frac{1}{3}}}{7 {(x + 1)}^{2}})$

Step 3

Rewrite $\log_{a} (\frac{5 x^{2} {(1 - 4 x)}^{\frac{1}{3}}}{7 {(x + 1)}^{2}})$ as $\log_{a} (5 x^{2} {(1 - 4 x)}^{\frac{1}{3}}) - \log_{a} (7 {(x + 1)}^{2})$ .

$\frac{3}{2} (\log_{a} (5 x^{2} {(1 - 4 x)}^{\frac{1}{3}}) - \log_{a} (7 {(x + 1)}^{2}))$

Step 4

Rewrite $\log_{a} (5 x^{2} {(1 - 4 x)}^{\frac{1}{3}})$ as $\log_{a} (5 x^{2}) + \log_{a} ({(1 - 4 x)}^{\frac{1}{3}})$ .

$\frac{3}{2} (\log_{a} (5 x^{2}) + \log_{a} ({(1 - 4 x)}^{\frac{1}{3}}) - \log_{a} (7 {(x + 1)}^{2}))$

Step 5

Rewrite $\log_{a} (5 x^{2})$ as $\log_{a} (5) + \log_{a} (x^{2})$ .

$\frac{3}{2} (\log_{a} (5) + \log_{a} (x^{2}) + \log_{a} ({(1 - 4 x)}^{\frac{1}{3}}) - \log_{a} (7 {(x + 1)}^{2}))$

Step 6

Expand $\log_{a} (x^{2})$ by moving $2$ outside the logarithm.

$\frac{3}{2} (\log_{a} (5) + 2 \log_{a} (x) + \log_{a} ({(1 - 4 x)}^{\frac{1}{3}}) - \log_{a} (7 {(x + 1)}^{2}))$

Step 7

Expand $\log_{a} ({(1 - 4 x)}^{\frac{1}{3}})$ by moving $\frac{1}{3}$ outside the logarithm.

$\frac{3}{2} (\log_{a} (5) + 2 \log_{a} (x) + \frac{1}{3} \log_{a} (1 - 4 x) - \log_{a} (7 {(x + 1)}^{2}))$

Step 8

Rewrite $\log_{a} (7 {(x + 1)}^{2})$ as $\log_{a} (7) + \log_{a} ({(x + 1)}^{2})$ .

$\frac{3}{2} (\log_{a} (5) + 2 \log_{a} (x) + \frac{1}{3} \log_{a} (1 - 4 x) - (\log_{a} (7) + \log_{a} ({(x + 1)}^{2})))$

Step 9

Expand $\log_{a} ({(x + 1)}^{2})$ by moving $2$ outside the logarithm.

$\frac{3}{2} (\log_{a} (5) + 2 \log_{a} (x) + \frac{1}{3} \log_{a} (1 - 4 x) - (\log_{a} (7) + 2 \log_{a} (x + 1)))$

Step 10

Simplify each term.

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Step 10.1

Combine $\frac{1}{3}$ and $\log_{a} (1 - 4 x)$ .

$\frac{3}{2} (\log_{a} (5) + 2 \log_{a} (x) + \frac{\log_{a} (1 - 4 x)}{3} - (\log_{a} (7) + 2 \log_{a} (x + 1)))$

Step 10.2

Apply the distributive property.

$\frac{3}{2} (\log_{a} (5) + 2 \log_{a} (x) + \frac{\log_{a} (1 - 4 x)}{3} - \log_{a} (7) - (2 \log_{a} (x + 1)))$

Step 10.3

Multiply $2$ by $- 1$ .

$\frac{3}{2} (\log_{a} (5) + 2 \log_{a} (x) + \frac{\log_{a} (1 - 4 x)}{3} - \log_{a} (7) - 2 \log_{a} (x + 1))$

Step 11

To write $\log_{a} (5)$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$\frac{3}{2} (2 \log_{a} (x) + \log_{a} (5) \cdot \frac{3}{3} + \frac{\log_{a} (1 - 4 x)}{3} - \log_{a} (7) - 2 \log_{a} (x + 1))$

Step 12

Combine $\log_{a} (5)$ and $\frac{3}{3}$ .

$\frac{3}{2} (2 \log_{a} (x) + \frac{\log_{a} (5) \cdot 3}{3} + \frac{\log_{a} (1 - 4 x)}{3} - \log_{a} (7) - 2 \log_{a} (x + 1))$

Step 13

Combine the numerators over the common denominator.

$\frac{3}{2} (2 \log_{a} (x) + \frac{\log_{a} (5) \cdot 3 + \log_{a} (1 - 4 x)}{3} - \log_{a} (7) - 2 \log_{a} (x + 1))$

Step 14

Move $3$ to the left of $\log_{a} (5)$ .

$\frac{3}{2} (2 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x)}{3} - \log_{a} (7) - 2 \log_{a} (x + 1))$

Step 15

To write $- 2 \log_{a} (x + 1)$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$\frac{3}{2} (2 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x)}{3} - 2 \log_{a} (x + 1) \cdot \frac{3}{3} - \log_{a} (7))$

Step 16

Combine $- 2 \log_{a} (x + 1)$ and $\frac{3}{3}$ .

$\frac{3}{2} (2 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x)}{3} + \frac{- 2 \log_{a} (x + 1) \cdot 3}{3} - \log_{a} (7))$

Step 17

Combine the numerators over the common denominator.

$\frac{3}{2} (2 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x) - 2 \log_{a} (x + 1) \cdot 3}{3} - \log_{a} (7))$

Step 18

Multiply $3$ by $- 2$ .

$\frac{3}{2} (2 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x) - 6 \log_{a} (x + 1)}{3} - \log_{a} (7))$

Step 19

Apply the distributive property.

$\frac{3}{2} (2 \log_{a} (x)) + \frac{3}{2} \cdot \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x) - 6 \log_{a} (x + 1)}{3} + \frac{3}{2} (- \log_{a} (7))$

Step 20

Simplify.

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Step 20.1

Cancel the common factor of $2$ .

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Step 20.1.1

Factor $2$ out of $2 \log_{a} (x)$ .

$\frac{3}{2} (2 (\log_{a} (x))) + \frac{3}{2} \cdot \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x) - 6 \log_{a} (x + 1)}{3} + \frac{3}{2} (- \log_{a} (7))$

Step 20.1.2

Cancel the common factor.

$\frac{3}{2} (2 \log_{a} (x)) + \frac{3}{2} \cdot \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x) - 6 \log_{a} (x + 1)}{3} + \frac{3}{2} (- \log_{a} (7))$

Step 20.1.3

Rewrite the expression.

$3 \log_{a} (x) + \frac{3}{2} \cdot \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x) - 6 \log_{a} (x + 1)}{3} + \frac{3}{2} (- \log_{a} (7))$

Step 20.2

Cancel the common factor of $3$ .

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Step 20.2.1

Cancel the common factor.

$3 \log_{a} (x) + \frac{3}{2} \cdot \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x) - 6 \log_{a} (x + 1)}{3} + \frac{3}{2} (- \log_{a} (7))$

Step 20.2.2

Rewrite the expression.

$3 \log_{a} (x) + \frac{1}{2} (3 \log_{a} (5) + \log_{a} (1 - 4 x) - 6 \log_{a} (x + 1)) + \frac{3}{2} (- \log_{a} (7))$

Step 20.3

Combine $\frac{3}{2}$ and $\log_{a} (7)$ .

$3 \log_{a} (x) + \frac{1}{2} (3 \log_{a} (5) + \log_{a} (1 - 4 x) - 6 \log_{a} (x + 1)) - \frac{3 \log_{a} (7)}{2}$

Step 21

Simplify each term.

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Step 21.1

Apply the distributive property.

$3 \log_{a} (x) + \frac{1}{2} (3 \log_{a} (5)) + \frac{1}{2} \log_{a} (1 - 4 x) + \frac{1}{2} (- 6 \log_{a} (x + 1)) - \frac{3 \log_{a} (7)}{2}$

Step 21.2

Simplify.

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Step 21.2.1

Multiply $\frac{1}{2} (3 \log_{a} (5))$ .

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Step 21.2.1.1

Combine $3$ and $\frac{1}{2}$ .

$3 \log_{a} (x) + \frac{3}{2} \log_{a} (5) + \frac{1}{2} \log_{a} (1 - 4 x) + \frac{1}{2} (- 6 \log_{a} (x + 1)) - \frac{3 \log_{a} (7)}{2}$

Step 21.2.1.2

Combine $\frac{3}{2}$ and $\log_{a} (5)$ .

$3 \log_{a} (x) + \frac{3 \log_{a} (5)}{2} + \frac{1}{2} \log_{a} (1 - 4 x) + \frac{1}{2} (- 6 \log_{a} (x + 1)) - \frac{3 \log_{a} (7)}{2}$

Step 21.2.2

Combine $\frac{1}{2}$ and $\log_{a} (1 - 4 x)$ .

$3 \log_{a} (x) + \frac{3 \log_{a} (5)}{2} + \frac{\log_{a} (1 - 4 x)}{2} + \frac{1}{2} (- 6 \log_{a} (x + 1)) - \frac{3 \log_{a} (7)}{2}$

Step 21.2.3

Cancel the common factor of $2$ .

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Step 21.2.3.1

Factor $2$ out of $- 6 \log_{a} (x + 1)$ .

$3 \log_{a} (x) + \frac{3 \log_{a} (5)}{2} + \frac{\log_{a} (1 - 4 x)}{2} + \frac{1}{2} (2 (- 3 \log_{a} (x + 1))) - \frac{3 \log_{a} (7)}{2}$

Step 21.2.3.2

Cancel the common factor.

$3 \log_{a} (x) + \frac{3 \log_{a} (5)}{2} + \frac{\log_{a} (1 - 4 x)}{2} + \frac{1}{2} (2 (- 3 \log_{a} (x + 1))) - \frac{3 \log_{a} (7)}{2}$

Step 21.2.3.3

Rewrite the expression.

$3 \log_{a} (x) + \frac{3 \log_{a} (5)}{2} + \frac{\log_{a} (1 - 4 x)}{2} - 3 \log_{a} (x + 1) - \frac{3 \log_{a} (7)}{2}$

Step 21.3

Combine the numerators over the common denominator.

$3 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x)}{2} - 3 \log_{a} (x + 1) - \frac{3 \log_{a} (7)}{2}$

Step 21.4

To write $- 3 \log_{a} (x + 1)$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$3 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x)}{2} - 3 \log_{a} (x + 1) \cdot \frac{2}{2} - \frac{3 \log_{a} (7)}{2}$

Step 21.5

Combine $- 3 \log_{a} (x + 1)$ and $\frac{2}{2}$ .

$3 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x)}{2} + \frac{- 3 \log_{a} (x + 1) \cdot 2}{2} - \frac{3 \log_{a} (7)}{2}$

Step 21.6

Combine the numerators over the common denominator.

$3 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x) - 3 \log_{a} (x + 1) \cdot 2}{2} - \frac{3 \log_{a} (7)}{2}$

Step 21.7

Multiply $2$ by $- 3$ .

$3 \log_{a} (x) + \frac{3 \log_{a} (5) + \log_{a} (1 - 4 x) - 6 \log_{a} (x + 1)}{2} - \frac{3 \log_{a} (7)}{2}$