問題詳情
3. 設f (x) = x3 - 3x2 - 4x + 12，g (x) = x3 - 2x2 - 9x + 18，a
R，則
(A) f (-2) g(-2) = 0且f (-2) + g(-2) ¹ 0
(B) 若f (a) g(a) = 0，f (a) + g(a) ¹ 0，則a = -2或-3
(C) 若f (a) g(a) ¹ 0，f (a) + g(a) = 0，則a =
(D) 若f (a) g(a) = 0，f (a) + g(a) = 0，則a = 2或3
(E) 若f (a) g(a) ¹ 0，f (a) + g(a) ¹ 0，則a ¹ ± 2, ± 3,
參考答案
答案：A,B,C,D,E
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)