Question

1° Calcule o valor de:
A)
$3 { - }^{2}$
B)
$5 { - }^{2}$
C)
$5 {}^{0}$

D)
$2 { - }^{1}$
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Answer 1

A. 1/9
B. 1/25
C. 1
D. 1/2