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解题方法
1 . 已知
,满足
,给出下列四个结论:①
;②
;③
;④
.其中一定成立的结论是__________ (写出所有成立结论的编号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64541d7f445079207b6f671adc7d662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b75a2236eb69ad2e5b47163166e819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55f9bf034aa02b5488c815517f13df3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea7b40fb78703a118ab61820f6742f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c1754a820689e353d1793af8ee008f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ad0e87974f63ab2947185643510034.png)
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2023-11-05更新
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168次组卷
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3卷引用:四川省眉山市仁寿县文宫中学2023-2024学年高一上学期12月月考模拟数学试题
四川省眉山市仁寿县文宫中学2023-2024学年高一上学期12月月考模拟数学试题上海市民办文绮中学2023-2024学年高一上学期期中数学试题(已下线)第四章 幂函数、指数函数与对数函数全章复习-【倍速学习法】(沪教版2020必修第一册)
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解题方法
2 . 下列结论正确的是( )
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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2023-10-30更新
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2卷引用:江苏省镇江等地区联盟校2023-2024学年高一上学期10月调研数学试题
解题方法
3 . 已知正数a,b满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d34836cf6d21bcadd4f60793ba150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296a77a7ca3e70fba643654bf5a99a3b.png)
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解题方法
4 . (1)已知
,
,
都是正实数,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b266ea51b4019ca1e7974f97c9e5c740.png)
(2)设
,且
,求证:
![](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/b266ea51b4019ca1e7974f97c9e5c740.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)
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解题方法
5 . (1)比较
与
的大小;
(2)已知
为不全相等的正实数,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375fff2f7742a0010332e9f7add47f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30cf2063e96e2fec6c509dce6cad6fec.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f0514c4015765d1b12b76f4df81215.png)
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6 . 已知
,
,下列命题中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
A.若![]() ![]() | B.![]() |
C.![]() | D.若![]() ![]() |
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解题方法
7 . 证明:
(1)若
,求证:
;
(2)若
,求证:
.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae41b4ea7f44a8699f108def4a22ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c79de030dea51c5e80e233b44788de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d2957f2fb09a6caf84dc5a0a8dfead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5673a0c44c18320db28445ac653a0acc.png)
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8 . 对于题目:已知
,
,且
,求
最小值.
甲同学的解法:因为
,
,所以
,
,从而
,所以
的最小值为
.
乙同学的解法:因为
,
,所以
.所以
的最小值为
.
丙同学的解法:因为
,
,所以
.
(1)请对三位同学的解法正确性作出评价(需评价同学错误原因);
(2)为巩固学习效果,老师布置了另外两道题,请你解决:
(i)已知
,
,且
,求
的最小值;
(ii)设
,
,
都是正数,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a120e118263f6b9fde8054e1a57479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bc579ce6e76737b53377b5c44b72b8.png)
甲同学的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee7c17173292f5f25112364145143fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62cd42aaaa823c0b862c8449b4a78e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba18dd6634f04aaf102c929c14095c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453ea8f3a2b85526b54bf453871c3820.png)
乙同学的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831ec03409081480f2943a55749ea0e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
丙同学的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b421a2b4f2ccc36be8416a6f21cdfed3.png)
(1)请对三位同学的解法正确性作出评价(需评价同学错误原因);
(2)为巩固学习效果,老师布置了另外两道题,请你解决:
(i)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/c0b256fd7584a2f3d3bd45b503a286e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf89638b5a0ed9a8b35260b042b691d.png)
(ii)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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2023-10-20更新
|
276次组卷
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3卷引用:辽宁省大连市第八中学2023-2024学年高一上学期10月月考数学试题
9 . 已知
,
为正数,证明下列不等式成立:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa23408bcc9f6200f22a310e5f2569a.png)
(2)
(其中
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa23408bcc9f6200f22a310e5f2569a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa2b7ea83c42b08f7fa98f40b7ceb797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
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10 . (1)已知
,
,求
的取值范围;
(2)已知a,b是正常数,且
,
,求证:
,指出等号成立的条件;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d9db7dac019e6a5cf09d481a5d28ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3d11728d0e8637d5c354759f8a3c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcb79c362bddb898f8a9d02a5f5d085.png)
(2)已知a,b是正常数,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439d29be659b489ed96a6d5d84d9b753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29574517e0bd98aa055ee15120f8fff1.png)
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