充分不必要
理由:依题设p←q为真,该命题的逆否命题非P→非q必真;p→q不成立,其逆否命题非P←非q也不成立,故非p是非q充分不必要条件.
若p是q的必要不充分条件,则非p是非q的___条件
若p是q的必要不充分条件,则非p是非q的___条件
为什么?
为什么?
数学人气:373 ℃时间:2020-06-04 02:31:32
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