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If f: (R) rarr (R) and g (R) rarr (R) de...

If `f: (R) rarr (R)` and `g (R) rarr (R)` defined by `f(x)=2x+3`and`g(x)=x^(2)+7`,then the values of x such that `g(f(x))=8`are

A

`±1`

B

`±1`

C

`±3`

D

`±4`

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The correct Answer is:
B
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