1 . 存在定义域为
的函数
满足( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
A.![]() ![]() |
B.![]() ![]() |
C.对任意的![]() ![]() |
D.![]() ![]() |
E.![]() ![]() ![]() ![]() |
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解题方法
2 . 已知函数
,若圆
与
的图象交于点
,与
的图象交于点
,其中点
都在第一象限内,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba75ef365e66bac5a501fc2f089ccab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c9912ba65c2a09c850ad65ed4732b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ebaa32f4f1f4f807ca9aeb7fb29951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6114947179bed8c2c86ac078e2f8497f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e453b6640e3dc4c7b7b2a996a2199ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a99246615a9b9d0cb282cac1dc28e08d.png)
A.![]() | B.1 | C.0 | D.不确定 |
您最近一年使用:0次
3 . 设X和Y是两个集合,
且
.证明:
(1)
.
(2)
.
(3)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d7786f55f767e0a301b5032cdacc79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6a1190f1f5a16833808df19c437fed.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e694ec4628362b02045e09923dfdad.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39aaaaa368cbea1c1fa8687da0d43d20.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84cd3c495d19893bb8e0ad2d6b0cfba5.png)
您最近一年使用:0次