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Let f be twice differentiable function s...

Let f be twice differentiable function satisfying f(1) = 1, f(2) = 4, f(3) =9 then :

A

f''(x) = 2, AA x in R

B

f'(x) = 5 = f'' (x), for some x in (1, 3)

C

There exists at least one x in (1,3) such that f''(x) = 2

D

none of these

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The correct Answer is:
C
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