Question

which is equal to $98^{-38}$?
$\frac{1}{(-98)^{-38}}$ $-98^{38}$ $\frac{1}{98^{38}}$ $\frac{1}{98^{-38}}$

Explanation:

Step1: Recall negative exponent rule

For any non-zero number $a$ and integer $n$, $a^{-n} = \frac{1}{a^n}$

Step2: Apply rule to $98^{-38}$

Substitute $a=98$, $n=38$ into the rule:
$98^{-38} = \frac{1}{98^{38}}$

Answer:

$\frac{1}{98^{38}}$