Let f(x)= array ll -1, & -2 x<0 x^ 2 -1, & 0 x 2 array . and g(x) = |f(x)| + f(|x|)…

Mathematics · JEE Main · NTA ExamsLimit, Continuity and Differentiability

Let \(f(x)=\left\{\begin{array}{ll} -1, & -2 \leq x<0 \\ x^{2}-1, & 0 \leq x \leq 2 \end{array}\right.\) and g(x) = |f(x)| + f(|x|). Then, in the interval (-2, 2), g is:
  1. non continous
  2. differentiable at all points
  3. not differentiable at two points
  4. not differentiable at one point

Answer

(D) not differentiable at one point

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