Precalculus Examples

$\log_{2} (\frac{128}{x^{2} + 7})$

Step 1

Rewrite $\log_{2} (\frac{128}{x^{2} + 7})$ as $\log_{2} (128) - \log_{2} (x^{2} + 7)$ .

$\log_{2} (128) - \log_{2} (x^{2} + 7)$

Step 2

Logarithm base $2$ of $128$ is $7$ .

$7 - \log_{2} (x^{2} + 7)$