问题
选择题
命题“若x2<1,则﹣1<x<1”的逆否命题是 [ ]
A.若x2≥1,则x≥1或x≤﹣1
B.若﹣1<x<1,则x2<1
C.若x>1或x<﹣1,则x2>1
D.若x≥1或x≤﹣1,则x2≥1
答案
答案:D
命题“若x2<1,则﹣1<x<1”的逆否命题是 [ ]
A.若x2≥1,则x≥1或x≤﹣1
B.若﹣1<x<1,则x2<1
C.若x>1或x<﹣1,则x2>1
D.若x≥1或x≤﹣1,则x2≥1
答案:D