Precalculus Examples

$y = 8^{- 2}$

Step 1

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$y = \frac{1}{8^{2}}$

Step 2

Raise $8$ to the power of $2$ .

$y = \frac{1}{64}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$y = \frac{1}{64}$

Decimal Form:

$y = 0.015625$