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6.設二次方程式4x2 + 12x + c = 0的兩根差為2,則c = (A) - 7 (B) - 5 (C)3 (D)5
問題詳情
6.設二次方程式4x2 + 12x + c = 0的兩根差為2,則c =
(A) - 7
(B) - 5
(C)3
(D)5
參考答案
答案:D
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
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