The set of points where the function f (x) = x |x| is differentiable is

Mathematics · JEE Main · NTA Exams — Limit, Continuity and Differentiability

1. \([-\infty, \infty)\)
2. \((-\infty, 0) \cup[0, \infty)\)
3. \([0, \infty)\)
4. \([0, \infty)\)

Answer

(A) [- , )

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