If f (x) = |x –1| and g (x) = f [ f f (x) ], then for x >2, g ’ (x) is equal to

Mathematics · JEE Advanced · NTA ExamsLimit, Continuity and Differentiability

If f (x) = |x –1| and g (x) = f [f { f (x) }], then for x >2, g’ (x) is equal to
  1. –1 if 2 < x < 3
  2. 1 if 2 < x < 3
  3. 1 for all x > 2
  4. None of these

Answer

(A) –1 if 2 < x < 3

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