E
Editor
Sep 18, 2022
If $f(x)=x-\frac{1}{x}$ then f'(x)=
Difficulty: Easy
A:
$\frac{1}{x^{2}}$
B:
1
C:
$1-\frac{1}{x^{2}}$
D:
$1+\frac{1}{x^{2}}$
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ID: 63273db8ca83163ac3a10257