Precalculus Examples

$p (a) = - 4^{3 a}$ ; Find $p (- 1)$

Step 1

Replace the variable $a$ with $- 1$ in the expression.

$p (- 1) = - 4^{3 (- 1)}$

Step 2

Simplify $- 4^{3 (- 1)}$ .

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Step 2.1

Remove parentheses.

$- 4^{3 (- 1)}$

Step 2.2

Multiply $3$ by $- 1$ .

$- 4^{- 3}$

Step 2.3

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

$- \frac{1}{4^{3}}$

Step 2.4

Raise $4$ to the power of $3$ .

$- \frac{1}{64}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$- \frac{1}{64}$

Decimal Form:

$- 0.015625$