Precalculus Examples

$\log (21) - \log (3)$

Step 1

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

$\log (\frac{21}{3})$

Step 2

Divide $21$ by $3$ .

$\log (7)$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\log (7)$

Decimal Form:

$0.84509804 \dots$