(1)已知集合M={x|x2-3x-28≤0},N={x|x2-x-2>0},求M∩N;
(2)已知不等式
的解集是{x|3<x<4},求实数a,b的值.
(2)已知不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2880c261c26fa0f0cb66d11a966c515.png)
更新时间:2020-11-30 21:21:17
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【推荐1】已知集合
,集合
,
.
(1)求
,
;
(2)若
是
的必要条件,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec899e239e7b8939f23449699f77dde3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edc866a3a1789d48c150d0cdb37f764.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f880c998cec27f60fa00fa94c852a3e5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3eb5935678e432e6f1f3180bfdb3175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知全集
, 集合A是不等式
的解集,
是函数
在
上的值域.
(1)求集合
;
(2)请写出一个非空集合
, 且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adca4a30b2865df1cf6e822037c370d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607342899c62ad010cdcae2dd5e802d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d390eebc4b442f483fcc342191b8ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a13f3df2e1a444f41bc132431848eaa.png)
(1)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
(2)请写出一个非空集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caab60f9dfaa3fee71e9687316b86ce0.png)
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【推荐1】已知集合
在①
;②“
”是“
”的充分条件;③
是
的必要条件.这三个条件中任选一个,补充到本题第(2)问的横线处,求解下列问题.
(1)当
;
(2)若_______,求实数
的取值范围.注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0324346ce7de81e62135a9079fc508.png)
![](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)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9dccb0f3cdcca85ed41ca903d5b9d0d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54162930af2f1820f380ee2d3e95ec6b.png)
(2)若_______,求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知关于
的不等式
的解集为
.
(1)求实数
,
的值;
(2)若正实数
,
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff41b6731acf36dd970c70eba3bd7612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6fc762c6bf13764516d2f0575fa7c7.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)若正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453f7331397798d54181456bf578a546.png)
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【推荐2】(1)已知关于x的不等式
的解集为
,求不等式
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(2)
,a+b=2,求证
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42f848c5ebf2980cccd9c81c78e8132.png)
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(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9338b4562fe2d41548310e5208837bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0d5bfaa7081b3b1c81757f7846aa12.png)
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