The set of points where f(x) = √|x| is not differentiable is:
The set of points where f(x) = √|x| is not differentiable is:
- A. {0}
- B. ∅
- C. R
- D. R \ {0}
Answer: A) {0}
Explanation: f(x) = √|x| has a vertical tangent (cusp) at x = 0. RHD = +∞, LHD = −∞, so not differentiable at 0.
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