1 . 已知二次函数
,
,
,若
且
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb8db31ba4eb424ae87561a05ada9a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f306d2b261f4c39a9fc0858d96e647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b1ef42dc8e1034dafa947ea9b640f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3ecbbaca8eeb1cfa8f4035f7d5726.png)
A.对任实数![]() ![]() |
B.对任意满足![]() ![]() ![]() |
C.对任意满足![]() ![]() ![]() |
D.存在实数![]() ![]() |
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2024高三下·全国·专题练习
解题方法
2 . 若函数
,则函数
的单调递增区间为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76fd5283f5e9e122e1d35d3f18299864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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2025高三·全国·专题练习
解题方法
3 . 已知函数
.当
时,求函数
最大值的表达式
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f9d0e54452c83ea8f78af0c608eb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0db2cae2e4d9c51adb60fe0a4da5caa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
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解题方法
4 . 若
的最小值是4,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9320b3402df781cf7cf789ec398fb4dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.6或![]() | B.![]() |
C.6或18 | D.![]() ![]() |
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解题方法
5 . 定义在
上的函数
满足对任意实数
都有
,若
时,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e6f5d45adf0314f93a495f037109bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d752d8db8a05b3ec7312f6ac8b64a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
A.先单调通淢后单调递增 | B.在![]() |
C.在![]() | D.单调性不确定 |
您最近一年使用:0次
解题方法
6 . 若函数
在
上不单调,则实数
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d278708e572ae39ac1f9e1d67bc630a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0e705301752424a492f6277ed7774e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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7 . 已知函数
满足对
且
,有
成立,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63fc9fe63be5d09069f08ad3b4fc5c4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ba6d93a671ca21730facc7fbf052c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e7ee80da08376cb9a6f0ac641b2d1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 已知函数
的定义域为R,对任意实数x,y都有
,当
时,
,且
,则关于x的不等式
的解集为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c282d2ec29ff3e68bb0e6a86be3dadcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be1d8c6384d7fabddb693b2b7fcdf4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f03f7f03fc83eedd93fcf9c5550bb81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049ec1d6c352d1f841fc3733bf2ae4fe.png)
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解题方法
9 . 下列说法正确的是( )
A.![]() ![]() |
B.函数![]() ![]() ![]() ![]() |
C.已知函数![]() ![]() ![]() |
D.函数![]() ![]() |
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解题方法
10 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/156c27e38e993045a66768f6d9c5dd64.png)
的值;
(2)在坐标系中画出
的草图;
(3)写出函数
的单调区间和值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/156c27e38e993045a66768f6d9c5dd64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1e8ae93be5d4f44440dc3d2613d0ea.png)
(2)在坐标系中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)写出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次