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解题方法
1 . 下列命题中正确的是( )
A.已知函数![]() ![]() ![]() ![]() ![]() |
B.已知定义在![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.函数![]() ![]() ![]() ![]() ![]() |
D.函数![]() ![]() ![]() |
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2 . 下列命题中正确的是( )
A.已知![]() ![]() ![]() ![]() |
B.![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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3 . 下列不等式的解集不是
的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
4 . 若实数
满足
,则称
比
远离
.
(1)若2比
远离1,求x的取值范围;
(2)设
,其中
,判断:
与
哪一个更远离
?并说明理由.
(3)若
,试问:
与
哪一个更远离
?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d32d4403d0e81eacfbe429dc51f07f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b782dd2de9c9caa840838cd63d817de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)若2比
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792be5953f7752ccf49405231fa1ebc0.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ea5e8fdf104e1cc8348c13a3cd1610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8151ce405ce7dd9f691fd62cd59be57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45900deae0489e87fe448948e8091c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ebc856291255f2d4a6c20b982a2442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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5 . 已知二次函数
满足
,
,
(1)求函数
的解析式;
(2)求关于
的不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bea8bf593f594c51fc7cc547482bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c743c3e91a0cdd162d97273e3aef239.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f683648cd3c90fae77e1317b918eed68.png)
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6 . (1)求不等式的解集:
;
(2)已知不等式
的解集为
,不等式
的解集为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d178b04135a17bca9bfd9e2e13cc16c5.png)
(2)已知不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e011b337fdb8459ca5006b772136c039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f90af9ba1a3d2362ecba6775e1d0030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
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7 . 已知
,不等式
的解集是
.若不等式组
的正整数解只有一个,则实数k的取值范围是________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75acb206b8bef18b1539ae064d457f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a1b1fdcdde97a8c9e9339b2f33c5d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9da57f7ffc9b3965e59f7f42ded80c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271f6fc3e10e2a97dd551bfb1cc7c5b2.png)
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8 . 设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d04d73c5b02fc71dabeec66648fc1601.png)
___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1284100efe4c4d14fe1c20afcb70f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d04d73c5b02fc71dabeec66648fc1601.png)
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9 . 下列命题中正确的是( )
A.若已知集合![]() ![]() ![]() ![]() ![]() |
B.函数![]() ![]() |
C.已知不等式![]() ![]() ![]() ![]() ![]() ![]() |
D.命题![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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10 . 下列说法错误的是( )
A.已知命题![]() ![]() ![]() ![]() |
B.“![]() ![]() |
C.已知![]() ![]() ![]() |
D.已知![]() ![]() ![]() |
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