Q.The set of points where f(x) x x x R = ∀ ∈ = ∀ ∈ = ∀ ∈ = ∀ ∈ is twice differentiable, will be -
Correct answer: (,0) (0,) −∞ ∪ ∞
Read, practise, and share this question using its permanent link.