6)已知一元二次不等式f(x)＜0的解集为{x|x＜-1或x＞1/2}，则f(10x)＞0的解集为(A){x|x＜-1或x＞lg2} (B){x|-1＜x＜lg2} (C){x|x＞-lg2}

問題詳情

6)已知一元二次不等式f(x)＜0的解集为{x|x＜-1或x＞1/2}，则f(10x)＞0的解集为
(A){x|x＜-1或x＞lg2}
(B){x|-1＜x＜lg2}
(C){x|x＞-lg2}
(D){x|x＜-lg2}

答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)