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If f:[0,1] to [0,prop) is differentiable...

If `f:[0,1] to [0,prop)` is differentiable function with decreasing first derivative suc that f(0)=0 and `f'(x) gt 0`, then

A

`f(1)gef'(1)`

B

`f'(c)ne0 " for any "c in (0,1)`

C

`f(1//2)gtf(1)`

D

None of these

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