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AP EAMCET202419 May 2024Evening ShiftMathematicsContinuity and DifferentiabilityActual

Let f (x)= x, x^2 for every real number of x . then

Options

  1. Af(x) is continuous for all x
  2. Bf(x) is differentiable for all x
  3. Cf^ (x)=2 for all x 1
  4. Df(x) is not differentiable at three values of x

Correct answer

A. f(x) is continuous for all x

Step-by-step solution

aligned f(x) & = x, x^2 & = array ccc x & if & x 0 x^2 & if & 0 x 1 x & if & 1 x array . aligned _ x 0⁻ f(x)= _ x 0⁻ x=0 Similarly, we can show _ x 0⁺ f(x)=0 So, f(x) is continuous at x=0 Similarly f(x) is also continuous at x=1 and f^ (x)= array cc 1, & x 0 2 x, & 0 x 1 1, & x 1 array . So, f(x) is not differentiable at x=0,1 .

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