解题方法
1 . 求证:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df7ca290a5d2f4d189fbdd509623e2f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a78c923c7d0e12343d37ef9eab845a3.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1e68f383b923afaa771076d06c10b1.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772fbd455cfda22084a1d7401ecfb70d.png)
您最近一年使用:0次
2023-10-09更新
|
519次组卷
|
5卷引用:北师大版(2019)必修第二册课本习题 习题4-1
北师大版(2019)必修第二册课本习题 习题4-1(已下线)专题5.2 三角函数的概念-举一反三系列7.2 三角函数概念(2)-【帮课堂】(苏教版2019必修第一册)(已下线)7.2.3 同角三角函数的基本关系式-【帮课堂】(人教B版2019必修第三册)(已下线)习题 4-1
2 . 已知
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b35fa8653fe660bdd23bb473b8f904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8548de3171db215c876e46c42f6878.png)
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3 . 已知x,y均为正数,试求证:若
(p为定值),则当且仅当
时,
取得最小值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f43ec9879c5c85482795c2676c3cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b9d5aaaceaa3ac514d17fcfefbf9b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280f7cc99fa100b85cc7a133811a9a8d.png)
您最近一年使用:0次
2023-10-07更新
|
81次组卷
|
3卷引用:北师大版(2019)必修第一册课本习题第一章3.2 基本不等式
4 . 已知
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b804002ee3d72ff947cfc8426f90047c.png)
您最近一年使用:0次
2023-10-07更新
|
258次组卷
|
3卷引用:北师大版(2019)必修第一册课本习题第一章3.2 基本不等式
5 . 求证:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a431fc00c5aadc9162678c49e041316.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e3ab9ca6742361e8681ed42e36e2f0.png)
您最近一年使用:0次
6 . 已知方程
有一根为
,求证:方程
必有一根
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59d0981710daa289c46a23d34435517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90bf45f18d95ba729ad9e53f03c5d76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f78ae07b1452e4f9dd8ba93db61d17.png)
您最近一年使用:0次
7 . 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1025c09a3b71630c2a3fd665be85a8c.png)
您最近一年使用:0次
8 . 利用三角函数线,说明当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcbe8b4bcd32e5a64ebfd873f8cbb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2788b9f792001e2dc1380e2a566566e0.png)
您最近一年使用:0次
解题方法
9 . 设
,
,求证下列不等式:
(1)
;
(2)
;
(3)
;
(4)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216682504182873f78cc43e6e46799cb.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f0274fb77878866cc088d719a060e3f.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d2e0a4dc2e7a7e72c1620374e038b8.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9fc73d3810e2573cfc02488c41baab.png)
您最近一年使用:0次
10 . 设
是方程
的两根,求证:
的最小值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d400d0ee58eb69f7643b89ec9e1ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63fc673a2dc9211e68ed28c2a2a6e6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c1f914da4657eca7865982b130b299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78fd95f89dec2d373fa57f02acd739f.png)
您最近一年使用:0次