Hi members,(adsbygoogle = window.adsbygoogle || []).push({});

Could any one help me with the problem following?

If x is a real number and P is a polynomial function, then

lim {P(x+3h)+P(x-3h)-2P(x)}/h^2

h->0

A)0

B)6P'(x)

C)3P''(x)

D)9P''(x)

E) 00

I guess D should be the answer, I need an explanation.

Thank You

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# A derivative problem

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