Let f:""(-1,""1) rarr R be a differentia...

Let `f:""(-1,""1) rarr R` be a differentiable function with `f(0)""=""-1" "a n d" "f'(0)""=""1` . Let `g(x)""=""[f(2f(x)""+""2)]^2` . Then `g'(0)""=` (1) `-4` (2) 0 (3) `2` (4) 4

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