名校
解题方法
1 . 已知集合
.
(1)当
时,关于
的不等式组
没有实数解,求实数
的取值范围;
(2)若
,且关于
的不等式
的解集为
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57c293ebc3b99cb7aff9b3e585dcdc7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bc9551406faf1c4f1e444dbd66237b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2454a6dc18fdf2cde16cb1b096ea8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/811625bead5bd88970550be98125aa3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5258a748e0915550223745b9d4aa68f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a837165ca03f9e4ea8964979c95e3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2 . 已知方程组
的解集为
.
(1)若方程组的一个解为
,求
的值;
(2)若
时,求
;
(3)当
时,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb834a8b167f55c254e20d8f1a698be3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf04b4991cc8ef8ffb9d8ef31d54ba20.png)
(1)若方程组的一个解为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f114df5ceabdb7e5fd3fdad4eaf056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0d7fbcc396c7b646c31f60e32d9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6abf3f9b0ebcdc47a028c781b7edb9.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7bb2271f0c1ae6f267beff842fcc44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88edfcabd49166a6dae74eecbdafd35f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 在解方程组
时,甲同学因看错了
的符号,从而求得解集为
,乙同学因看错了
的值,从而求得解集为
,试求
、
、
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2474bdb077bfd5964472b70dfd48de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7403e3b8711e1c53efc2086f7058b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b78cc6ec6be3f2f682614c8185edfac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
名校
解题方法
4 . 已知
,关于x的不等式组
没有实数解,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cfada8fd642ddf968bfd4228d48ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a375237b5cbca3d8037ade210aaa6583.png)
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名校
解题方法
5 . 设函数
.
(1)解关于x的不等式
;
(2)当
,
时,记不等式
的解集为P,集合
.若对于任意正数t,
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2fec67c27e234b7e78c0ae71dfdbec.png)
(1)解关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0edcf7314fbef5f6147f559c3005d60.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731bdc8d2686a05f12a2ba8a7e3b01be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5077b8e9afeb9f2d284427acb13ac84f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567673e4f4033026cef3aabe9f8ac731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0541697f9fffb316df0f64bf409847.png)
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名校
解题方法
6 . 已知集合
,
,若
.
(1)求实数a的值;
(2)设二次函数
在
处的y值为m,解关于x的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc6da2989327f3f84398e8695c89ebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa21866a95700e7c6a92466fe264706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015b3900cbc2ebd24ea23b041aafea87.png)
(1)求实数a的值;
(2)设二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3ba3449c6cdbd05064a0179e2a1b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853e3c15d116fb61f236ab239c50b114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3696f4438f0b13aa0be7399f8988e885.png)
您最近一年使用:0次
解题方法
7 . 已知集合
,函数
.
(1)解关于
的不等式:
;
(2)设不等式
的解集为
,若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5de4f8d3d7a41963b43968fe446503e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c693e142215d092d1a6e74438227082b.png)
(1)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc804f4d3befaafabad4030af54bd36.png)
(2)设不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0792b1567c7775125bfda136e6023c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f1ba0a1129741502600e47bf058c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
8 . (1)解关于
的不等式
;
(2)若
{
关于
的不等式
的解集为空集},(1)中不等式的解集是
,
中有且只有三个元素,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4e05bab25cfd6ad9e2de2f75ff4ffd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e903ccf63ba0a03cfb588bef168c1bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675095c5036b7c187e3d5cdb50b9d895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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9 . 已知方程
的所有解组成的集合
,方程
的所有解组成的集合为
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc992c9e51d4b22232adf6bb5c8055a.png)
(1)求实数
的值;
(2)求集合
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44f6c11bb95223c4465924efcdfaa5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a35c85b538d670f0d97af530abffb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc992c9e51d4b22232adf6bb5c8055a.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d523eca6a54d7b01e7b9997735d38b95.png)
(2)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
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