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JEE Math Practice Question

If ƒ(1) = 1, ƒ'(1) = 3, then the derivative of ƒ(ƒ(ƒ(x))) + (ƒ(x))2 at x = 1 is :

  1. A.33
  2. B.12
  3. C.9
  4. D.15

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