题目内容

(本题满分15分)

已知命题p,命题q. 若“pq”为真命题,求实数m的取值范围.

 

【答案】

【解析】利用命题的真值时对应的m的取值范围求解,由“”为真命题,知都是真命题

,知

,即

又由,得

最终可解得。

解:由,知

,   -------------------4分

,即.         -------------------6分

又由,得

,-------------------10分

由题意,                                  -----------------------12分

由“”为真命题,知都是真命题,            

所以,符合题意的的取值范围是.             ------------------------15分

 

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