Precalculus Examples

$21 \ln (x) + \ln (y) - 3 \ln (z)$

Step 1

Simplify each term.

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Step 1.1

Simplify $21 \ln (x)$ by moving $21$ inside the logarithm.

$\ln (x^{21}) + \ln (y) - 3 \ln (z)$

Step 1.2

Simplify $- 3 \ln (z)$ by moving $3$ inside the logarithm.

$\ln (x^{21}) + \ln (y) - \ln (z^{3})$

Step 2

Use the product property of logarithms, $\log_{b} (x) + \log_{b} (y) = \log_{b} (x y)$ .

$\ln (x^{21} y) - \ln (z^{3})$

Step 3

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

$\ln (\frac{x^{21} y}{z^{3}})$