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Find the correct statement:...

Find the correct statement:

A

If s = `1/2t^(2)` is the equation of motion of a particle with usual notations then its velocity at t = 2 is 2 units/unit time.

B

If a function is continuous at a point then there is not necessary that the function is differentiable at that point.

C

If `f(x) = abs(x-1) then f'(x)` exists at x = 1

D

given `y = 2^(x) dy/dx =x 2^(x-1)`

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