1 . 下列命题的证明最适合用分析法的是( )
A.证明:![]() | B.若![]() ![]() ![]() |
C.证明:![]() ![]() ![]() | D.证明:![]() |
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2 . 用分析法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7879fda25c826a205d024ca19f76a5c1.png)
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3 . (1)用分析法证明:
(当且仅当
时等号成立);
(2)设
为曼哈顿扩张距离,其中
为正整数.如
.若
对一切实数
恒成立.设
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c76da5edd4633d1fb68e3a4ede06473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd68c14adb3cf12d8f77aec55a053284.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350bc6680b01296d43c94b4d2477c1f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47a512e82abbcd0a647239620e8be39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70c57ebaf9a10ac167d32017564f027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f916ad5246cc2f42386422d8726ecdfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485a2d99320384a0857b00ce9ab9e990.png)
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名校
4 . 用分析法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3c473f62cfb7383001dc520e848785.png)
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5 . 分析法又称执果索因法,若用分析法证明:“设
,且
,求证
”,则索的因应是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff6d61a8eaff20b364a9e3235577c69.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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6 . 设
.
(1)若
,证明:
;
(2)已知
,
且
,用分析法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114b1d85a3f52a2959c49ec25630dfaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec307143b4bf45106369f256a796d61.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4dcc5d823c113fcd61c4b7e9639a5a9.png)
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7 . (1)已知
,试用分析法证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b1411bbc505b5056e68e077d18e06b.png)
(2)等差数列
中,已知
,试求n的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b6c5526947e9bef051bc3bdf7fd186d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b1411bbc505b5056e68e077d18e06b.png)
(2)等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342ead1007636d0f9aed521b7bc73779.png)
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解题方法
8 . (1)已知
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9185519a1b1928d6cd4147f43c738145.png)
(2)设
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9185519a1b1928d6cd4147f43c738145.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ada798eeba5bd19d497bfd0741afd00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a737185eb85ca24cf66409ce1e09bc.png)
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解题方法
9 . (1)已知b克糖水中含有a克糖
,再添加m克糖
(假设全部溶解),糖水变甜了.我们将这一事实表示为不等式:当
时,有
,请证明这个不等式;
(2)设
的三边长分别为
,请利用第(1)问已证不等式证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d49655ebe52ed0e7561f0da99cbe9fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111f948bc9a44eef670a04f31e4dedd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0ba96a400a4c158eefc9648b0c130c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16171f1f79d33dbdf4e2dc280b16943.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13a05f5aca98574bb1f927123490de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f4233a7afad30d1ae8f8cda1901a9e.png)
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2022-10-23更新
|
270次组卷
|
5卷引用:陕西省西安市鄠邑区2022-2023学年高二下学期期中模拟理科数学试题
陕西省西安市鄠邑区2022-2023学年高二下学期期中模拟理科数学试题福建省莆田第一中学、擢英中学2023-2024学年高一上学期10月月考数学试题(已下线)第二章 一元二次函数、方程和不等式单元复习提升-速记·巧练(人教A版2019必修第一册)云南省昆明市第八中学2023-2024学年高一上学期12月月考数学试题四川省眉山市彭山区第一中学2022-2023学年高一上学期10月月考数学试题
10 . (1)用综合法证明:已知a,b,c都是实数,
;
(2)用分析法证明:对于任意a,
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718baee4ebadc334bb21aa4898ee72b9.png)
(2)用分析法证明:对于任意a,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57e3aae0913a02658df0f67ba8c126c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd5fc9df715d87bb7646d066f845563.png)
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2022-07-15更新
|
145次组卷
|
2卷引用:陕西省宝鸡教育联盟2022-2023学年高二下学期3月月考文科数学试题