名校
解题方法
1 . 若
,则下列正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . (1)已知x,y,z都是正数,求证:
;
(2)设a>0,b>0,a+b=2,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca946693693753e4b53403dfff80761.png)
(2)设a>0,b>0,a+b=2,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c092b3cff0286f02e299b09e0349f588.png)
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名校
3 . 已知
,
,则下列式子一定成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
4 . 设函数
,其中
,
,
.
(1)若当
时,
有最小值,求
的最小值;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef2f5d243912d3545e37d3579b9016b.png)
![](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/8cec12441802f71e803efaf2c62ee588.png)
(1)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce460941cf3ff54ccb6aec5085689a91.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcef60e5d4f3b49a3c6e2507e8998439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d689b0da0bd4803b3e8a6c69542ae466.png)
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2021-11-14更新
|
165次组卷
|
3卷引用:广东省广州市第七中学2021-2022学年高一上学期期中数学试题
名校
5 . 已知
,下列不等式中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb993b720fccaed91435fc8b2272e85b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
6 . 已知
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be08ee1528492fd899664eb1857000f4.png)
(2)求
的最小值,并求此时
与
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778a72f5f2de7f3ba705840f8357e79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be08ee1528492fd899664eb1857000f4.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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2021-11-09更新
|
189次组卷
|
3卷引用:广东省东莞市新世纪英才学校2021-2022学年高一上学期第一次教学质量检测数学试题
7 . 下列说法正确的有( )
A.集合![]() ![]() ![]() |
B.设集合![]() ![]() |
C.已知![]() ![]() ![]() |
D.已知![]() ![]() |
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名校
解题方法
8 . 选用恰当的证明方法,证明下列不等式.
(1)已知
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbefc06b3b4e54a6a1690e870efc69b.png)
(2)已知a,b,c为正数,且满足
.证明:
;
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a521891098b625f372ff648d110afe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbefc06b3b4e54a6a1690e870efc69b.png)
(2)已知a,b,c为正数,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56667aabbe787eb1c3189d487d203e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3681a97ebef383e8968347548102fb49.png)
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2021-11-07更新
|
349次组卷
|
3卷引用:甘肃省兰州市西北师范大学附属中学2021-2022学年高一上学期期中数学试题
解题方法
9 . (1)若
,比较
与
的大小;
(2)已知x,y,z是不全相等的正实数,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bb182c11828ef829a01c0d13f3f9dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cbec06c8cb9891ac12e28d29414d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b04b385894ad75674a418c21b3b861.png)
(2)已知x,y,z是不全相等的正实数,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f673e706c82572e5c4a929862e5ce36.png)
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解题方法
10 . 设
,
,下列不等式正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次