Precalculus Examples

$\log_{3} (\frac{9 x^{3} y}{z^{2} \sqrt{w}})$

Step 1

Rewrite $\log_{3} (\frac{9 x^{3} y}{z^{2} \sqrt{w}})$ as $\log_{3} (9 x^{3} y) - \log_{3} (z^{2} \sqrt{w})$ .

$\log_{3} (9 x^{3} y) - \log_{3} (z^{2} \sqrt{w})$

Step 2

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{w}$ as $w^{\frac{1}{2}}$ .

$\log_{3} (9 x^{3} y) - \log_{3} (z^{2} w^{\frac{1}{2}})$

Step 3

Rewrite $\log_{3} (9 x^{3} y)$ as $\log_{3} (9 x^{3}) + \log_{3} (y)$ .

$\log_{3} (9 x^{3}) + \log_{3} (y) - \log_{3} (z^{2} w^{\frac{1}{2}})$

Step 4

Rewrite $\log_{3} (9 x^{3})$ as $\log_{3} (9) + \log_{3} (x^{3})$ .

$\log_{3} (9) + \log_{3} (x^{3}) + \log_{3} (y) - \log_{3} (z^{2} w^{\frac{1}{2}})$

Step 5

Expand $\log_{3} (x^{3})$ by moving $3$ outside the logarithm.

$\log_{3} (9) + 3 \log_{3} (x) + \log_{3} (y) - \log_{3} (z^{2} w^{\frac{1}{2}})$

Step 6

Logarithm base $3$ of $9$ is $2$ .

$2 + 3 \log_{3} (x) + \log_{3} (y) - \log_{3} (z^{2} w^{\frac{1}{2}})$

Step 7

Rewrite $\log_{3} (z^{2} w^{\frac{1}{2}})$ as $\log_{3} (z^{2}) + \log_{3} (w^{\frac{1}{2}})$ .

$2 + 3 \log_{3} (x) + \log_{3} (y) - (\log_{3} (z^{2}) + \log_{3} (w^{\frac{1}{2}}))$

Step 8

Expand $\log_{3} (z^{2})$ by moving $2$ outside the logarithm.

$2 + 3 \log_{3} (x) + \log_{3} (y) - (2 \log_{3} (z) + \log_{3} (w^{\frac{1}{2}}))$

Step 9

Expand $\log_{3} (w^{\frac{1}{2}})$ by moving $\frac{1}{2}$ outside the logarithm.

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

Step 10

Simplify each term.

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Step 10.1

Combine $\frac{1}{2}$ and $\log_{3} (w)$ .

$2 + 3 \log_{3} (x) + \log_{3} (y) - (2 \log_{3} (z) + \frac{\log_{3} (w)}{2})$

Step 10.2

Apply the distributive property.

$2 + 3 \log_{3} (x) + \log_{3} (y) - (2 \log_{3} (z)) - \frac{\log_{3} (w)}{2}$

Step 10.3

Multiply $2$ by $- 1$ .

$2 + 3 \log_{3} (x) + \log_{3} (y) - 2 \log_{3} (z) - \frac{\log_{3} (w)}{2}$