13-14高三上·上海·阶段练习
1 . 定义函数
(定义域),若存在常数C,对于任意
,存在唯一的
,使得
,则称函数
在D上的“均值”为C.已知函数
,则函数
在
上的均值为 ( )
![](https://img.xkw.com/dksih/QBM/2014/1/10/1571474261311488/1571474266390528/STEM/4f6392375c0a4c58abee91469c742074.png?resizew=105)
![](https://img.xkw.com/dksih/QBM/2014/1/10/1571474261311488/1571474266390528/STEM/780c29c88f9f42c18d0f168f9156fe5a.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2014/1/10/1571474261311488/1571474266390528/STEM/95b4f34549ea41d59a658e071c1f9db6.png?resizew=49)
![](https://img.xkw.com/dksih/QBM/2014/1/10/1571474261311488/1571474266390528/STEM/a9e70d3a59974fe799fc3588c9889036.png?resizew=125)
![](https://img.xkw.com/dksih/QBM/2014/1/10/1571474261311488/1571474266390528/STEM/5fe19b2c35d8459aa64b602910ce1238.png?resizew=62)
![](https://img.xkw.com/dksih/QBM/2014/1/10/1571474261311488/1571474266390528/STEM/aea1a4f417c0409c8f5f4cf750dc392e.png?resizew=153)
![](https://img.xkw.com/dksih/QBM/2014/1/10/1571474261311488/1571474266390528/STEM/5fe19b2c35d8459aa64b602910ce1238.png?resizew=62)
![](https://img.xkw.com/dksih/QBM/2014/1/10/1571474261311488/1571474266390528/STEM/be8a4c1e6117405994cc2018cb4cc884.png?resizew=53)
A.![]() | B.![]() | C.10 | D.![]() |
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解题方法
2 . 设
,若
的值域为
,则实数
的范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24c841ea56aa614dde37e0ab22cb2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3 . 已知函数f(x)=|log4x|,正实数m、n满足m<n,且f(m)=f(n),若f(x)在区间[m5,n]上的最大值为5,则m、n的值分别为
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 若函数
在
上的最小值和最大值之和为
,则
的值为_____ .
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999195402240/1572999201300480/STEM/1bf0e93c46534948a74aa6e47e6ec59b.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999195402240/1572999201300480/STEM/7da97beeeb2f478e880150177eee5a5f.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999195402240/1572999201300480/STEM/649cc3e76ee14ca18efc2e50c66bbf33.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999195402240/1572999201300480/STEM/649cc3e76ee14ca18efc2e50c66bbf33.png?resizew=13)
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解题方法
5 . 已知函数
.
(1)若函数
的最小值为
,求
的值;
(2)若对任意
,都有
成立,求函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f472831dceaf279baee364d71e23e8c8.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2829640afea635e445c30a6528f7c4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0be07495dbc744e1ecabac66f748218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638a1127ac6277a203e7a8c1b035d67c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051a937e1a597ed105947375589aa86f.png)
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6 . 设常数
,实数
满足
,若
的最大值为
,则
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751afe327bd2cd6e0d2336556ee5aded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9defa23d2a9b88f4dd10e0ea4bef2189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b1188f04e95228c95114ee1005e985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2024·全国·模拟预测
解题方法
7 . 已知函数
在区间
上有最大值或最小值,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd2f622fc47456c74f1b0fc55a21620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996ec7256ee8ba6359e9a8cec01aaca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
8 . 已知函数
.
(1)若
的定义域为
,求
的取值范围;
(2)若
的值域为
,求
的取值范围;
(3)设
,若对任意
,函数
在区间
上的最大值与最小值的差不超过1,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d849b398ebe71b26f1430e0d5938aaac.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc0e2d6debff3defb88984d2592e955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82dca4a0e082b5cbdb1beb6f4d1e2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020高三·全国·专题练习
9 . 已知函数
满足
.
(1)求
的解析式;
(2)设函数
,若
在
上的最大值为2,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e05d647f17827c2b3d145d356ca04b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b65aff712cd02f6f8bb981861064de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25a4b68d7be63ec223f642976a1087ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次