Precalculus Examples

$\log_{b} (\sqrt[4]{\frac{x^{5} b^{6}}{y^{4} z^{10}}})$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt[4]{\frac{x^{5} b^{6}}{y^{4} z^{10}}}$ as ${(\frac{x^{5} b^{6}}{y^{4} z^{10}})}^{\frac{1}{4}}$ .

$\log_{b} ({(\frac{x^{5} b^{6}}{y^{4} z^{10}})}^{\frac{1}{4}})$

Step 2

Expand $\log_{b} ({(\frac{x^{5} b^{6}}{y^{4} z^{10}})}^{\frac{1}{4}})$ by moving $\frac{1}{4}$ outside the logarithm.

$\frac{1}{4} \log_{b} (\frac{x^{5} b^{6}}{y^{4} z^{10}})$

Step 3

Rewrite $\log_{b} (\frac{x^{5} b^{6}}{y^{4} z^{10}})$ as $\log_{b} (x^{5} b^{6}) - \log_{b} (y^{4} z^{10})$ .

$\frac{1}{4} (\log_{b} (x^{5} b^{6}) - \log_{b} (y^{4} z^{10}))$

Step 4

Rewrite $\log_{b} (x^{5} b^{6})$ as $\log_{b} (x^{5}) + \log_{b} (b^{6})$ .

$\frac{1}{4} (\log_{b} (x^{5}) + \log_{b} (b^{6}) - \log_{b} (y^{4} z^{10}))$

Step 5

Expand $\log_{b} (x^{5})$ by moving $5$ outside the logarithm.

$\frac{1}{4} (5 \log_{b} (x) + \log_{b} (b^{6}) - \log_{b} (y^{4} z^{10}))$

Step 6

Expand $\log_{b} (b^{6})$ by moving $6$ outside the logarithm.

$\frac{1}{4} (5 \log_{b} (x) + 6 \log_{b} (b) - \log_{b} (y^{4} z^{10}))$

Step 7

Logarithm base $b$ of $b$ is $1$ .

$\frac{1}{4} (5 \log_{b} (x) + 6 \cdot 1 - \log_{b} (y^{4} z^{10}))$

Step 8

Multiply $6$ by $1$ .

$\frac{1}{4} (5 \log_{b} (x) + 6 - \log_{b} (y^{4} z^{10}))$

Step 9

Rewrite $\log_{b} (y^{4} z^{10})$ as $\log_{b} (y^{4}) + \log_{b} (z^{10})$ .

$\frac{1}{4} (5 \log_{b} (x) + 6 - (\log_{b} (y^{4}) + \log_{b} (z^{10})))$

Step 10

Expand $\log_{b} (y^{4})$ by moving $4$ outside the logarithm.

$\frac{1}{4} (5 \log_{b} (x) + 6 - (4 \log_{b} (y) + \log_{b} (z^{10})))$

Step 11

Expand $\log_{b} (z^{10})$ by moving $10$ outside the logarithm.

$\frac{1}{4} (5 \log_{b} (x) + 6 - (4 \log_{b} (y) + 10 \log_{b} (z)))$

Step 12

Simplify each term.

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Step 12.1

Apply the distributive property.

$\frac{1}{4} (5 \log_{b} (x) + 6 - (4 \log_{b} (y)) - (10 \log_{b} (z)))$

Step 12.2

Multiply $4$ by $- 1$ .

$\frac{1}{4} (5 \log_{b} (x) + 6 - 4 \log_{b} (y) - (10 \log_{b} (z)))$

Step 12.3

Multiply $10$ by $- 1$ .

$\frac{1}{4} (5 \log_{b} (x) + 6 - 4 \log_{b} (y) - 10 \log_{b} (z))$

Step 13

Apply the distributive property.

$\frac{1}{4} (5 \log_{b} (x)) + \frac{1}{4} \cdot 6 + \frac{1}{4} (- 4 \log_{b} (y)) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14

Simplify.

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Step 14.1

Multiply $\frac{1}{4} (5 \log_{b} (x))$ .

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Step 14.1.1

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

$\frac{5}{4} \log_{b} (x) + \frac{1}{4} \cdot 6 + \frac{1}{4} (- 4 \log_{b} (y)) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.1.2

Combine $\frac{5}{4}$ and $\log_{b} (x)$ .

$\frac{5 \log_{b} (x)}{4} + \frac{1}{4} \cdot 6 + \frac{1}{4} (- 4 \log_{b} (y)) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.2

Cancel the common factor of $2$ .

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Step 14.2.1

Factor $2$ out of $4$ .

$\frac{5 \log_{b} (x)}{4} + \frac{1}{2 (2)} \cdot 6 + \frac{1}{4} (- 4 \log_{b} (y)) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.2.2

Factor $2$ out of $6$ .

$\frac{5 \log_{b} (x)}{4} + \frac{1}{2 \cdot 2} \cdot (2 \cdot 3) + \frac{1}{4} (- 4 \log_{b} (y)) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.2.3

Cancel the common factor.

$\frac{5 \log_{b} (x)}{4} + \frac{1}{2 \cdot 2} \cdot (2 \cdot 3) + \frac{1}{4} (- 4 \log_{b} (y)) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.2.4

Rewrite the expression.

$\frac{5 \log_{b} (x)}{4} + \frac{1}{2} \cdot 3 + \frac{1}{4} (- 4 \log_{b} (y)) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.3

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

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} + \frac{1}{4} (- 4 \log_{b} (y)) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.4

Cancel the common factor of $4$ .

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Step 14.4.1

Factor $4$ out of $- 4 \log_{b} (y)$ .

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} + \frac{1}{4} (4 (- \log_{b} (y))) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.4.2

Cancel the common factor.

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} + \frac{1}{4} (4 (- \log_{b} (y))) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.4.3

Rewrite the expression.

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} - \log_{b} (y) + \frac{1}{4} (- 10 \log_{b} (z))$

Step 14.5

Cancel the common factor of $2$ .

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Step 14.5.1

Factor $2$ out of $4$ .

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} - \log_{b} (y) + \frac{1}{2 (2)} (- 10 \log_{b} (z))$

Step 14.5.2

Factor $2$ out of $- 10 \log_{b} (z)$ .

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} - \log_{b} (y) + \frac{1}{2 (2)} (2 (- 5 \log_{b} (z)))$

Step 14.5.3

Cancel the common factor.

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} - \log_{b} (y) + \frac{1}{2 \cdot 2} (2 (- 5 \log_{b} (z)))$

Step 14.5.4

Rewrite the expression.

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} - \log_{b} (y) + \frac{1}{2} (- 5 \log_{b} (z))$

Step 14.6

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

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} - \log_{b} (y) + \frac{- 5}{2} \log_{b} (z)$

Step 14.7

Combine $\frac{- 5}{2}$ and $\log_{b} (z)$ .

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} - \log_{b} (y) + \frac{- 5 \log_{b} (z)}{2}$

Step 15

Move the negative in front of the fraction.

$\frac{5 \log_{b} (x)}{4} + \frac{3}{2} - \log_{b} (y) - \frac{5 \log_{b} (z)}{2}$