If f(x)=2x+1, $g(x)=x^{2}-1$ and fog(x)=7, then x=

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If f(x)=2x+1, $g(x)=x^{2}-1$ and fog(x)=7, then x=

E

Editor

Sep 18, 2022

If f(x)=2x+1, $g(x)=x^{2}-1$ and fog(x)=7, then x=

Difficulty: Easy

A:

2

B:

-2

C:

2 and -2

D:

None

ID: 63273db8ca83163ac3a106ef