1.

Let f(x) be twice differentiable function for all real x and f(1) = 1, f(2) = 4 , f(3) = 9. Then which one of the following statements is definitelly true ?

Answer»

`F'' (X)= 2 ` for all `x in ( 1,3)`
`f'(x) = f'(x) = 5` for some `x in (2,3)`
`f'' (x) = 3` for all `x in ( 2,3)`
`f'' (x) = f(x_(0))`

Answer :A


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