Let f: R-> R, g:R->R and h:R->R be the d...

Let `f: R-> R, g:R->R and h:R->R` be the differential functions such that `f(x)=x^3+3x+2, g(f(x))=x and h(g(g(x)))=x, for all x in R. Then` (a)g'(2)=`1/15` (b)h'(1)=666 (c)h(0)=16 (d)h(g(3))=36

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