E
Editor
Sep 18, 2022
For any $a\:\epsilon\:R$
Difficulty: Easy
A:
$a^{2}>0$
B:
$a^{2}<0$
C:
$a^{2}\leq\:0$
D:
$a^{2}\geq\:0$
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ID: 63273dbaca83163ac3a12063