CPM Homework Help : GB8I Problem 1-81

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1-81.

Rewrite each expression below without negative or zero exponents.

$\quad 4 ^ { - 1 }$

Hint (a):
$x^{-n}= \frac{ 1 }{ x^{n}}$
Answer (a):
$\frac{ 1 }{4 }$

$\quad 7 ^ { 0 }$

Hint (b):
$x^{\circ} = 1$
Answer (b):
$7^{\circ} = 1$

$5 ^ { - 2 }$

Hint (c):
Refer to part (a).
Answer (c):
$\frac{1}{5^2}$

$x ^ { - 2 }$

Hint (d):
Refer to part (a).
Answer (d):
$\frac{ 1 }{x^2}$

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