2025年教学资料:第2章不等式(单元测试)(解析版)
第2章不等式单元测试一、单项选择题(在每小题给出的四个选项中,只有一项是符合题目要求的)1.如果,那么下列运算正确的是( )A.B.C.D.【答案】D【分析】根据不等式的性质逐一判断即可.【详解】解:因为,所以,故A错误;,故B错误;,故C错误;,故D正确.故选:D.2.下列命题为假命题的是( )A.若,,则B.若,,则C.若,,则D.若,,则【答案】D【分析】利用不等式的性质逐项判断作答.【详解】对于A,若,,则,A是真命题;对于B,若,,则,B是真命题;对于C,若,,则,C是真命题;对于D,取,满足,,而,D是假命题.故选:D3.已知,则( )A.B.C.D.【答案】B【...
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