1 . 用适当的方法证明下列命题,求证:
(1)
;(
)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840ab5202c0dd51fb0d9aa14a500fd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3eb9b6fe8959ae9e71e857b6d6fed49.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734f585f8cfc92522f6daf997ebec04d.png)
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2021-10-03更新
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5卷引用:青海省海南藏族自治州高级中学2022-2023学年高二下学期期末考试数学(理)试题
2 . 计算:
,
;所以
;又计算:
,
,
;所以
,
.
(1)分析以上结论,试写出一个一般性的命题;
(2)判断该命题的真假.若为真,请用分析法给出证明;若为假,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab60bf2cd96c89716535d287e1e5730e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a2de18918df4f06f29c232b3543a32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98cdb98805ab4a51d5edf97c4d11f3c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fd510988ced5d7eca08a3d8f651571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422bb31d9be2f6b89945034eadd8b90c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1c69852c24e97cdb26b40408827d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3792d738e15382ea8f910b42531273b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec4fd1e621825718bdf99d31a631624b.png)
(1)分析以上结论,试写出一个一般性的命题;
(2)判断该命题的真假.若为真,请用分析法给出证明;若为假,请说明理由.
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2019-05-24更新
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2卷引用:陕西省安康市汉滨区七校2022-2023学年高二下学期期末联考理科数学试题