已知二次函数
,
,对任意
,
,且
恒成立.
(1)求二次函数
的解析式;
(2)若函数
的最小值为5,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0771ac9412754da7120cd226311db9d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8c7bb4fe82c62be38565dae4d303b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9b23587bc1d3b4e5327168386c2d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753d793682672ce16b95700c7b1d22ab.png)
(1)求二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc013bc57cad9bc289ee417ff58b4da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
22-23高一上·江苏无锡·期中 查看更多[2]
更新时间:2022-11-03 13:07:45
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】从“①
;②方程
有两个实数根
,
;③
”三个条件中任意选择一个,补充到下面横线处,并解答.
已知函数
为二次函数,
,
,___________.
(1)求函数
的解析式;
(2)若不等式
对一切实数x恒成立,求实数k的取值范围.
注:如果选择多个条件分别进行解答,按第一个解答进行计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1767e7ee3fee7bbb19b1c1b3c64b5a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3047d4ab078dafc06c047bcbf0a6ffaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089c3608df214a5bc8a25d47550d2927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5774e3866dd39d9936d25ad695f3e292.png)
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937fa2432ebf6e60ad23b21d597d4c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e64110e70076812fb5b5bda4d75fdb.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6506a4f19f0dc29d65849d3f8aceee27.png)
注:如果选择多个条件分别进行解答,按第一个解答进行计分.
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【推荐2】已知二次函数
满足
,且
.
(1)求
的解析式;
(2)若两个不相等的正数
,
满足
,求
的最小值.
(3)若函数
在区间
上不单调,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0293497cf4d27e07f2989ca6d0debae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51eb2613dda00677d447c986cac505bc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若两个不相等的正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9ba50ede8ef97b843accf839fef5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf25a724783207f85e8e84f7ed18b2b.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41396999fce75ce8fdf4a8725de79bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26c416363ab2a9ed000b429540db55e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】设函数
(
,
且
).
(1)若
,且不等式
在区间
恒成立,求实数
的取值范围;
(2)若
,函数
在区间
上的最小值为
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f1a326456ba10c718efdcf7d525e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d8742c296a7949b598114a34c51f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1dd729a2435418b74e8b56b92a587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87c830a03204a5b783ad4c2ba49c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56fbec93189276445b83c6df4e9f4866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1b6a97182bf7e313389bd039241974.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be381da62d4a042476aa11dbd5824e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐3】已知函数
.
(1)若函数y=f(x)在
上的最大值为8,求实数m的值;
(2)若函数y=f(x)在(1,2)上有唯一的零点,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44557fe75185e5b2e10db41ae1f8aa1.png)
(1)若函数y=f(x)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390c620c0fd4a2cd8622171bdaf05f5d.png)
(2)若函数y=f(x)在(1,2)上有唯一的零点,求实数m的取值范围.
您最近一年使用:0次
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解题方法
【推荐1】已知函数
是定义域为
的奇函数.
(1)求实数
的值;
(2)若
,且不等式
在
上恒成立,求实数
的取值范围;
(3)若
,且
在
上的最小值为-2,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3accc72154f9424d6f6dd421adf9d9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7401098afc2e4e31aa68c18c38deabc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56fbec93189276445b83c6df4e9f4866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d766939723e074c699d4fa25b66e4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dcdd87d593df4a5c5e98d47fe1cfa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
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【推荐2】已知函数
是定义在
上的奇函数,且
.
(1)求实数a的值;
(2)对于
,
成立,求实数m的取值范围.
![](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/7c52ce1b9ddf0917091421f94d9a883b.png)
(1)求实数a的值;
(2)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ce7ee39adb7f117ca6e6298da02a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8dc867bb51020a7a832e817a91b826a.png)
您最近一年使用:0次
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【推荐3】已知二次函数
的最小值为
,且
.
(1)求
的解析式;
(2)当
时,
恒成立,试确定实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a24f9fc43c87a7cc98bc10d694d9f4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75436ed14b8d87e476497be17bf5af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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