Which of the following is not true? (A)...

Which of the following is not true?
(A) A polynomial function is always continuous
(B) A continuous function is always differentiable
(C) A differentiable function is always continuous
(D) None of these

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Assertion (A) : A continuous function is always differentiable. Reason (R ) : A differentiable function is always continuous.

A polynomial function is everyehere continuous.

show that a constant function is always differentiable.

Is every differentiable function continuous?

Is every continuous function differentiable?

Show that every polynomial function is continuous.

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If f(x) is continuous function , then

the addition of differentiable and non- differentiable functions is always non- differentiable.