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1 . (1)
为实数,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f25298d03745e6d91799449ed9e96a.png)
(2)用分析法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f25298d03745e6d91799449ed9e96a.png)
(2)用分析法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b492c09f576ab6491af4848ce7ecec4.png)
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2 . (1)已知正数a,b,c满足
,求证:
.
(2)已知
,
,
,用分析法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a57e060f61f7efa54982bda67db483a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9070c818e51d19f4ff4e9e16091dd5cc.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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解题方法
3 . 选用恰当的方法证明下列不等式
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679e658fa5679ce73e1b5fdfe434b724.png)
(2)已知
,证明:
.
(3)已知a,b,c均为正实数,求证:若
,则
.
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679e658fa5679ce73e1b5fdfe434b724.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa4f85f4d4f4bd9edaa8a964565ca1a.png)
(3)已知a,b,c均为正实数,求证:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a57e060f61f7efa54982bda67db483a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d54c9eb01acfe09c34cb808326cc5e.png)
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4 . (1)设
求证
(写出证明过程)
(2)请用你所学过的数学知识证明“糖水加糖会变甜”(假定糖水始终为不饱和溶液)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57f40c3bad0be09964a27f59721cc39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba0a3d92a604e519d434ef5af1d12d9.png)
(2)请用你所学过的数学知识证明“糖水加糖会变甜”(假定糖水始终为不饱和溶液)
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5 . 选用恰当的证明方法,证明下列不等式.
(1)证明:求证
;
(2)设
,
,
都是正数,求证:
.
(1)证明:求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c19d94ff48082c1cd213c82c99abf0.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533937a08d1ed87594ac52c658be9649.png)
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2019-11-23更新
|
1312次组卷
|
3卷引用:辽宁省大连市2019-2020学年高一上学期期中数学试题
辽宁省大连市2019-2020学年高一上学期期中数学试题(已下线)2.2基本不等式-2021-2022学年高一数学同步辅导讲义与检测(人教A版2019必修第一册)安徽省池州市青阳县第一中学2020-2021学年高二下学期3月月考文科数学试题
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6 . (1)设
,
是不全为零的实数,试比较
与
的大小.
(2)用反证法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf877c2f179cf4e47657882ee8fa14d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ecbb4dc189112b811b31483f2aa695.png)
(2)用反证法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557d2e3133709e7153c6177a52afc6e3.png)
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解题方法
7 . (1)已知
都是正实数,求证:
.
(2)设
,且
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef3052cd1be7641eb559c5d7ed142cb.png)
(2)设
![](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)
您最近一年使用:0次
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8 . (1)已知
,求证:
;
(2)求证:
(其中
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ada798eeba5bd19d497bfd0741afd00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbc2278547879e9246de7e749a774d7.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2753dee1cf2935ce2f46ef406fc0e15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a671406a5442a3088a4ee1d064114a.png)
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2022-09-15更新
|
476次组卷
|
3卷引用:辽宁省大连市第二十高级中学2022-2023学年高一上学期10月月考数学试题
名校
解题方法
9 . (1)已知
,
,
,用反证法证明:
、
中至少有一个大于等于0;
(2)已知不等式
对于
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eea4cae6014499d16c9a07b20a3bb07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b30c2866a0433f6d45a1fdd3f9f621e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0591fb0e193c1204dbd4a20f3b116e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
(2)已知不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea88be3999d306b57dd987fffe26d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324396bc0b4db86f1966bc3b6389945b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/834f625c49d85fcc6adb40e41e440646.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
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10 . 设
,且
.
(1)求
的最小值;
(2)证明:
与
不可能同时成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a75db28a1a99bd2e72566399d7891c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ac82d99a7af1bc48bd18c8420a670.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97b4b10492ae1c2b34d6baafe7de848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbb50b863ac3cfd8eefcc605b0a28af.png)
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