A point c in the domain of a function f is called a critical point of f if

f is not differentiable at x = c

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Either f' (c) = 0 or f is not differentiable

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f' (x) = 0 at x = c

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f" (x) = 0, at x = c

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Solution

The correct option is B
Either f' (c) = 0 or f is not differentiable

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A point c in the domain of a function f is called a critical point of f if

The correct option is B Either f' (c) = 0 or f is not differentiable

The correct option is B
Either f' (c) = 0 or f is not differentiable