解题方法
1 . 已知定义域为
的函数
,对任意
恒有
.
(1)求证:当
时,
.
(2)若
,恒有
,求证:
必有反函数.
(3)设
是
的反函数,求证:
在其定义域内恒有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd29ef32d9bc2e32ef2b8639b57dc9a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bea6d14c16f7c06e4e028f36131360.png)
(1)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ad4c3cb38a5ce9b06167ce7217453d6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d6b59f4796a45963dea76b89c72bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d6b59f4796a45963dea76b89c72bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c75efd66493102acfe77edff8fd9db97.png)
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解题方法
2 . 方程
(
且
)的解的个数为______ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc02529b9f209a7b9f69284d9978a14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
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解题方法
3 . 已知函数
,则关于
的不等式
的解集为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311f3e37df87ee30884645c0729553c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc549b5bc2655d7883184d1ed1f44c8.png)
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4 . 设
,若存在常数
使得对于任意的
,都有
满足
,则
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eac4d6bf066089b2243947dbdb18cf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff83cf36f43fdae2ae584bd5060a66bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648056709a55446f597e5849d7fc41fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 函数
在
上的最大值与最小值之和为
,则a的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2e278fa2af1abd628a432b0a9abe36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87c830a03204a5b783ad4c2ba49c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
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解题方法
6 . 若函数
的定义域为集合
,函数
的定义域为集合
,函数
的定义域为集合
,则
之间的关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae80bf381098060213f77f1a1d59c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f29eb36e5dd5b00d18785e37f9fd781a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff9cc73550075c1f384867efbe82d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
A.![]() | B.![]() |
C.![]() | D.以上答案都不对 |
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7 . 设定义域、值域均为
的函数
的反函数为
,且
,则
的值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135bcf6d7f7c04641823b90f1d038eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39aaae228ee5433a30a92b382d5b924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4207c0c380fe06d3dcc360cb18647f.png)
A.2 | B.0 | C.![]() | D.![]() |
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8 . 已知
是定义在
上的偶函数,且对任意
都有
,当
时
,则函数
在区间
上的反函数
的值
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bb52ffd6d767f3ebb8ac7ccf3f6058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d44ac5cb478916f81ef2d42911258aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3b6d18e5ec745cbe1dccac06031c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a1c92c42188e3b2cb800d1186eab12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d6b59f4796a45963dea76b89c72bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6be5b07b257a4c94bcefedb0d64f34.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
9 . 设
是一个实数,若对于任何实数
,不等式
0恒成立,则
的取值范围是________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9aaa67368c2c77bc75d4b3f4b59e78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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10 . 设函数
的反函数为
,且
的图象过点
,则
的图象必过点______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135bcf6d7f7c04641823b90f1d038eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f803e878a0384869f4ef5fa672574884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f935fa5d0ae1b208aff21aa468ecf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135bcf6d7f7c04641823b90f1d038eee.png)
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