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

JEE Advanced 2016 Mathematics question

Let , and be differentiable functions such that , and for all . Then

Answer: (B),(C)

, and means . (A) , so : false. (B) with

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Question ID VK-026530