Let R be the set of real numbers and the...

Let R be the set of real numbers and the function `f: RR to RR and g: RR to RR` be defined by `(f)x=x^(2)+2x-3 and g(x)=x+1`. The the value of x for which `f(g(x))=-g(f(x))`, is

A

`-1`

B

0

C

1

D

2

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