Fundamentholfundamenthol
JEE Main2019Math
Q.

Let f be a differentiable function such that f (1) = 2 and f '(x) = f(x) for all xR. If h(x) = f(f (x)), then h'(1) is equal to :

  1. A

    2e 

  2. B

    2e2

  3. C

    4e

  4. D

    4e2

Solution

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