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Suppose that g(x)=1+sqrtx and f(g(x)) = ...

Suppose that `g(x)=1+sqrtx` and `f(g(x)) = 3 + 2sqrtx +x,` then `f(x)` is

A

1+x

B

2+x

C

`2+x^(2)`

D

`1+2x^(2)`

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