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请教一个高中数学问题

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ydb316 Posted 2017-4-3 11:29 |Read mode
已知命题P:若x^2-1>0,则x>1,命题q:若x^2-1>0,则x<-1,则命题p或q为_______命题(填“真”或“假”)
参考答案为  真
我的理解:命题P为假,命题q为假,命题p或q应为假。
另外:若把命题p或q写出应为“若x^2-1>0,则x>1或x<-1”,当然为真。
究竟该如何理解,敬请专家给予详解,谢谢!

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色k Posted 2017-4-3 15:24
你确定p或q是那样写嘀?

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 Author| ydb316 Posted 2017-4-3 19:04
回复 2# 色k
谢谢

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 Author| ydb316 Posted 2017-4-3 19:58
回复 2# 色k 未命名111.JPG

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