用“<”或“>”填空.
(1)若a-1>b-1,则a____ b; (2)若a+3>b+3,则a____ b;
(3)若5a>5b,则a____ b; (4)若-5a>-5b,则a___ b.
(1)若a-1>b-1,则a
(3)若5a>5b,则a
更新时间:2018-02-23 10:03:30
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【推荐1】若0<a<1,用“<”连接a,1,
,结果为___________________ .
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【推荐2】举例说明命题“若
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”是假命题,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8201ff29a2091d40eee10db6bbc1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8845c0d06613fabb0358d5392cca38b3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
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