Continuity and DifferentiabilityHard

Question

If ƒ(x) =, then  -

Options

A.ƒ′(x) = 1 for all x
B.ƒ′(x) = 1 for all x ≤ 1
C.ƒ′(x) = 1 for all x ≥ 1
D.-

Solution

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