Set, Relation and FunctionHard

Question

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

Options

A.(- ∞, 0) ∪ (0, ∞)

B.(- ∞, -1) ∪ (-1, ∞)

C.(- ∞, ∞)

D.(0, ∞)

Solution

f(x) = ⇒ f′(x) =
∴ f′(x)exist at everywhere.

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