名校
解题方法
1 . (1)已知
,试比较
与
的大小;
(2)求证:对任意
,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8282c112688f155bef0c49e2f9f5c3ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22082b1b9e07b105c135b4ddcc0785ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765e25b98a60dfe520a831714843d960.png)
(2)求证:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c7aab4df25884973273efae244f2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c45d1f29d8bd5d4357fd106b6e2106.png)
您最近一年使用:0次
2 . 设
,则“
”是“
”的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2671a54305f2aedce64f0d015c2fcaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3379e3044db748222d1551de88a5b493.png)
A.充分而不必要条件 | B.必要而不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次