1 . 已知集合
,
.若
,则实数
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9a1e9dd14cbd2271ba2f472664ad57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a92c3b621448afc43ad38e8b2b3c1904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52f72b65d657a4899745dc054ab733c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2 . 已知集合
,
,且
,则正整数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c66eddb6b1bf5b988c724cc5499790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d487f2c044f439615668f799d12f3656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf601b482eefb189e27db4893df8d8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
您最近一年使用:0次
3 . 设集合
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bfabec7a3b2e912c1b549d0714341c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a38e7cd828755bd6a41e1efb9e7d82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
您最近一年使用:0次