4.設f(x)為實係數三次多項式,右圖所示為函數y=f(x)的圖形,其中(5,f(5))為反曲點。試問f(x)的導函數f'(x)可能為下列哪一個選項?
(A)(x-5)2-1
(B)(x-5)2+1
(C)(x-5)2
(D)-(x-5)2+1
(E)-(x-5)2-1
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統計: A(1), B(2), C(0), D(0), E(0) #3118945
統計: A(1), B(2), C(0), D(0), E(0) #3118945