Precalculus Examples

$\log_{a} (1280^{\frac{1}{2}})$

Step 1

Expand $\log_{a} (1280^{\frac{1}{2}})$ by moving $\frac{1}{2}$ outside the logarithm.

$\frac{1}{2} \log_{a} (1280)$

Step 2

Rewrite $\log_{a} (1280)$ as $\log_{a} (2^{8} \cdot 5)$ .

$\frac{1}{2} \log_{a} (2^{8} \cdot 5)$

Step 3

Rewrite $\log_{a} (2^{8} \cdot 5)$ as $\log_{a} (2^{8}) + \log_{a} (5)$ .

$\frac{1}{2} (\log_{a} (2^{8}) + \log_{a} (5))$

Step 4

Expand $\log_{a} (2^{8})$ by moving $8$ outside the logarithm.

$\frac{1}{2} (8 \log_{a} (2) + \log_{a} (5))$

Step 5

Apply the distributive property.

$\frac{1}{2} (8 \log_{a} (2)) + \frac{1}{2} \log_{a} (5)$

Step 6

Cancel the common factor of $2$ .

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Step 6.1

Factor $2$ out of $8 \log_{a} (2)$ .

$\frac{1}{2} (2 (4 \log_{a} (2))) + \frac{1}{2} \log_{a} (5)$

Step 6.2

Cancel the common factor.

$\frac{1}{2} (2 (4 \log_{a} (2))) + \frac{1}{2} \log_{a} (5)$

Step 6.3

Rewrite the expression.

$4 \log_{a} (2) + \frac{1}{2} \log_{a} (5)$

Step 7

Combine $\frac{1}{2}$ and $\log_{a} (5)$ .

$4 \log_{a} (2) + \frac{\log_{a} (5)}{2}$