1 . 设集合
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12c38480d3d0dc62ae4db77248cd6491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5ed2117abd95d6b4a0e01d2590ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
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2 . 命题“
”的否定是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a681db9d16446fc1122bedfca952f66b.png)
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解题方法
3 . 若集合
,且“
”是“
”的必要不充分条件,则实数
的取值范围为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9390d354fb607dba1febac28170fcf26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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4 . “
”的否定是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff764687ad33e4e832597e0409708be6.png)
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名校
5 . 已知命题
:
,
.若命题
为假命题,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35eac3ba2858adffcd1f8052cd795269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8f64073232d721200ebc29f78a0a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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6 . 已知集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1336d38741aab2255a35c26612bbd7cc.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbb4856059e8a5b34157aefc12f23e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1336d38741aab2255a35c26612bbd7cc.png)
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名校
7 . 定义集合运算:
. 若集合
,
,则集合
的子集个数为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7854970a4f3992d733486aacce7fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf4f84f80c8b325c2df2ff86aee0b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3505503dfb8b6be71739a8e2fa316828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4886a0297bf379db51e06d7020051f0.png)
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名校
8 . 一群学生参加学科夏令营,每名同学至少参加一个学科考试.已知有 100名学生参加了数学考试,50名学生参加了物理考试,48名学生参加了化学考试,学生总数是只参加一门考试学生数的2倍,也是参加三门考试学生数的3倍,则学生总数为______ .
您最近一年使用:0次
名校
解题方法
9 . 使不等式
成立的一个充分不必要条件是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9628a52a2d66782e5ea1a5dadf28444.png)
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10 . 已知
:
;
:
,若
是
的充分条件,则
的取值范围为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02dca80beb53e16961415dad66337652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e07ade7560a1179342ddecf4ce9dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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