Let f:RR to RR,g:RR to RR and h:RR to RR...

Let `f:RR to RR,g:RR to RR` and `h:RR to RR` be differentiable functions such that `f(x)=x^(3)+3x+2,g(f(x))=x` and `h(g(g(x)))=x` for all `x in RR`. Then,

g'(2)=1/15

h'(1)=666

h(g(3))=36

None of these

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