1.

If ƒ(x) = x3 + 2x2 -1, then ƒ(a+h)-ƒ(a)/h =

A. 0
B. 1
C. h2 + a2
D. h2 + (3a+2)h + 3a2 + 4a
Answer» D. h2 + (3a+2)h + 3a2 + 4a


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