Precalculus Examples

$\log_{9} (20) - \log_{9} (4)$

Step 1

Use the quotient property of logarithms, $\log_{b} (x) - \log_{b} (y) = \log_{b} (\frac{x}{y})$ .

$\log_{9} (\frac{20}{4})$

Step 2

Divide $20$ by $4$ .

$\log_{9} (5)$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\log_{9} (5)$

Decimal Form:

$0.73248676 \dots$