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NDA2012MathematicsContinuity and DifferentiabilityActual

Which one of the following functions is differentiable for all real values of x ?

Options

  1. Ax |x|
  2. Bx|x|
  3. C1 |x|
  4. D1 x

Correct answer

B. x|x|

Step-by-step solution

The correct answer is option B.

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