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NDA2021MathematicsDifferentiationActual

Let f(x) be a polynomial function such that f f(x)=x^4 . What is f^ (1) equal to?

Options

  1. A0
  2. B1
  3. C2
  4. D4

Correct answer

C. 2

Step-by-step solution

aligned & Let f(x)=x^2 & f[f(x)]= (x^2 )^2=x^4 & f^ (x)=2 x & f^ (1)=2 aligned

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