1.

If f(x) is a twice differentiable function and given that f(1) = 1, f(2) = 4, f(3) = 9, then?

A. f″(x) = 2, for ∀ x ∈ (1, 3)
B. f″(x) = f′(x) = 5 for some x ∈(2, 3)
C. f″(x) = 3, ∀ x ∈ (2, 3
D. f″(x) = 2, for some x ∈ (1, 3)
Answer» E.


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