已知
.
(1)若
,求
;
(2)若“
”是“
”的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48fd8e5f266774e10d13065204f2b784.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)若“
![](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)
20-21高二下·上海虹口·期末 查看更多[2]
更新时间:2021-08-08 23:45:54
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相似题推荐
解答题-问答题
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【推荐1】使不等式
对一切实数
恒成立的
的取值范围记为集合
,集合
.
(1)求集合
;
(2)若
是
的充分条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cebcf4baf1ab8b05e7e3f7fa91454f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00877faf4a0484daa050c1def4cc5fa8.png)
(1)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ded9fb125cc78010e6ea6361b1f17b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2decf3988929a8cf628f665069e843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
【推荐2】已知集合
.
(1)当
时,求
;
(2)若
,且
是
的真子集,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648486021ee4611b73b8828ee9495197.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd25565368dcc9a70c3bb70dae0529db.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/695b3a03afad9a636616e82604520521.png)
您最近一年使用:0次
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解题方法
【推荐1】设
,集合
.
(1)若
,求
;
(2)若
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d8ab4d3bcf40c50c07658146d53a193.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e315827714c0bb9bd5b47611def0902a.png)
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解答题-问答题
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适中
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解题方法
【推荐2】已知集合
,
,
.
(1)求集合
;
(2)若
且
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a1280cbc11c68d014ea6661f8c62b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de93de05b11e79948960ca380cc8f34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7602b2145c829d94b895afb1bfc78812.png)
(1)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff109d3fadee141f93b199a5a72bc161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
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适中
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解题方法
【推荐1】对于
,函数
恒成立.
(1)求k值的集合A;
(2)设集合
,若______,求实数m的取值范围.
在①
;②“
”是“
”的充分条件;这两个条件中任选一个补充在第(2)问中,并给出解答.
注:如果选择多个条件分别作答,则按第一种情况解答给分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc41ff4d3167b834418a4db6c88b658.png)
(1)求k值的集合A;
(2)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc764628205b3fb682beba01031a9ab9.png)
在①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d50619b779c1056602f46b2a95e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
注:如果选择多个条件分别作答,则按第一种情况解答给分.
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【推荐2】设
实数满足
;
实数
使得命题:“
,使
”是假命题.若
是
的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f16876246ee348f8db1703c228446d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69b498178132272fc9bdaee2b65430a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】某中学的小乔同学参加上海市举办的禁毒知识测试大赛,本次大赛由十道选择题组成,得分规则为:作对一题得1分,做错一题扣去1分,不做得0分,总得分7分才算及格。小乔的目标是及格,在这次考试中,他确定他做的前六题全对,记6分,而他做余下的四道题中,每道题作对的概率均为
,考试中,小乔思量:从余下的四道题中再做一题并且及格的概率
;从余下的四道题中恰做两道并且及格的概率
,他发现
,只做一道反而更容易及格.
(1)设小乔从余下的四道题中恰做三题并且及格的概率为
,从余下的四道题中全做并且及格的概率为
,求
及
;
(2)计算:小乔从余下的四道题中,恰做几道时及格的概率最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c8578f06897aa6fb84aa95c797d3d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda2f4c91913e2d6d1ed53926de77069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601a3d02e07b146cddf65607921d5855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e322065a0eddccb28b00753732a251.png)
(1)设小乔从余下的四道题中恰做三题并且及格的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
(2)计算:小乔从余下的四道题中,恰做几道时及格的概率最大?
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【推荐2】已知关于
的函数y=
.(x∈R)
(1)当
时,求不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16439716d29d996eb458bc10fbe8f17.png)
0的解集;
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16439716d29d996eb458bc10fbe8f17.png)
0对任意的
恒成立,求实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16439716d29d996eb458bc10fbe8f17.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16439716d29d996eb458bc10fbe8f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e119c508fd265e3e3d78749e54fe4f43.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16439716d29d996eb458bc10fbe8f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e119c508fd265e3e3d78749e54fe4f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc4136bd17997e11a7f8abcb19f9018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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