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解答题判断下列命题的真假.(1)命题“在△ABC中,若AB>AC,则∠C>∠B
解答题判断下列命题的真假.(1)命题“在△ABC中,若AB>AC,则∠C>∠B
发布时间:2020-07-28 17:54:25
解答题判断下列命题的真假.(1)命题“在△ABC中,若AB>AC,则∠C>∠B”的逆命题;(2)命题“若ab≠0,则a≠0且b≠0”的否命题;(3)命题“若a≠0,且b≠0,则ab≠0”的逆否命题
网友回答
(1)该命题的逆命题:在△ABC中,若∠C>∠B,则AB>AC,命题为真命题(2)该命题的否命题:若ab=0,则a=0或b=0,,命题为真命题(3)该命题的逆否命题:若ab=0,则a=0或b=0,命题为真命题
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