名校
解题方法
1 . 已知函数
.若
,不等式
恒成立,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b919a59954cf503f515e45573deba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9f109b7ce6ec37e69d54ec70643c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
2 . 已知函数
定义域为
.
(1)求
的取值范围;
(2)当
时,函数
的图象始终在函数
的图象上方,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703c5f5f5316f7e3461550262b057275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6d804ef44bfc64f824b0ccef71765e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f1a939f4c755490d52484c7fcaf98b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b5e9031206ff27e2c7fd41593601ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
解题方法
3 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df8e9dda6f89d7c16c02d8dacf7461.png)
(1)当
时,求该函数的值域;
(2)若
对于
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df8e9dda6f89d7c16c02d8dacf7461.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66ef59c3970f3581a5ea29e21fd564d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd303ea196ae03b9c08459ad1f2f30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f3fc2a6b50f762c8378283b56023f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
解题方法
4 . 已知
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d75f1439ca9d6b4a5390edfd63264ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e55607f9df598ab900800dd24c30ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03efea9187950f1a8b5016c79e114822.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
5 . 若函数
,则关于x的不等式
的解集是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce6fb7b113b0baea323b9d9129e3e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ffb083270fccc5eeb3e1409d1a64847.png)
您最近一年使用:0次
解题方法
6 . 已知
,设
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6576b85f837f8ab8af1bd4ee6e39ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf7f9e77cde8abd7925125d1cc1474fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fefafdd9acd05b2acd4fd588a5b145b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f26e31ab8bdd8f39548bb0bd7e74d5b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
7 . 定义域为R的函数
满足
为偶函数,且当
时,
恒成立,
则
的大小关系为______ .(从大到小排列)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7661d3fc28f785b438ad8c8f9d240a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848988f68790e43dc63165b0d2e7abc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4531f8e96fc371f01546325a9f61a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ffc15195be196e8f2398382fd9f959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
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解题方法
8 . 已知函数
的定义域为
,若存在
,满足
,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b54839668b67db018b6669128219a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0408b9502dcc197dcf528337ef0b617b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90a9c4f1370f3c8bcbf0ef8a55d2bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9d4b3187917982df25569dc34154c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
9 . 已知函数
.若
,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/483796c965fccef2b613fa1b293d2d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9a102ee64dedb8c8f66dd862bf4443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
10 . 已知
,
,
,则下列结论一定成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de07daa4c7c7cfcf5241726fa788e6ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/832444aae81de7f780b5e496315cc82e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d625d77f3bfadc66947098bc41233d2.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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