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If f: RvecR and g: RvecR are defined by ...

If `f: RvecR` and `g: RvecR` are defined by `f(x)=2x+3a n dg(x)=x^2+7,` then the value of `x` such that `g(f(x))=8` a,`1,2` b.`-1,2` c.`-1,-2` d.`1,-2`

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