二次函数
满足条件:
①当
时,
的图象关于直线
对称;
②
;
③
在
上的最小值为
;
(1)求函数
的解析式;
(2)求最大的
,使得存在
,只要
,就有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddec24902a5853c3675c2377ad9c4a2.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87cd4403487962c38c8707ba3ab3fa3.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求最大的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884ce1e9436d39f34f6d3116cb2a140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995ec593baa4ef50b6d87c78380953d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02085df8a8854702aa8c57d7f6c0aaf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa5db87f46602bdba3df300ffe16b0a.png)
12-13高一上·广东河源·阶段练习 查看更多[1]
(已下线)2011-2012学年广东省龙川一中高一12月月考数学
更新时间:2016-12-01 12:44:08
|
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解答题-问答题
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解题方法
【推荐1】已知二次函数
的最小值为1,且
.
(1)求函数
的解析式;
(2)求
在
上的最大值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bf2c692b53c12d792878d65bf3bfad.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252691df280f0bc4d3e1ff29f056be39.png)
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【推荐2】已知函数
(
)的最小值为–1.
(1)求实数a的值;
(2)当
,
时,求函数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649991ebc5a146db5fce7f2fbeaa98a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)求实数a的值;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcd78ddf3856a9100e71ee5655a0c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf039c46a25e331446c6ee1e9af3c82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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【推荐3】已知函数
.
(1)若
在
上是增函数,求
的取值范围;
(2)若
,求函数
在区间
上的最小值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27aeadcf221ccaf2a5e562be309e49c1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1215d01764a3b041d2f4497806da95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301bacc282b75b95f9bee92a618d544f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6552c3a42c2629ef9533f0fc651736.png)
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【推荐1】从“①
,
;②方程
有两个实数根
,
;③
,
”这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
对任意实数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/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09b19d9021fa4ade3da27f174937213.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502c4ff1cd420b9da4de849e63c307e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419504736c4934f6e0df4114c3743944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effaa3a863d9d18f1d1b69dde1add429.png)
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c525859c8f8c11f56d7184d6672eda0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db92ae4746a34821d8c5b1cce16486b.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa33af79ab3a04f037ae701e41d5f6bd.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】已知函数
是二次函数,且满足不等式
的解集为
和
.
(1)求
的解析式;
(2)求函数
,
的最小值;
(3)若
,试将
的最小值表示成关于
的函数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da34ce730f711c09909d53806fe2330a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ff5f5621db0dd6d5edaef8948a924b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f280ed139f0126a96a27b6871a4741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa90da5074afd9bcb543a74a1f3adc37.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb4e62ea5df8cd4fd82ad56155f78ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3466b71d1d9117438ed50388a57d9397.png)
您最近一年使用:0次
解答题-问答题
|
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(0.85)
名校
解题方法
【推荐1】已知二次函数
满足
,且
.
(1)求函数
的解析式;
(2)令
,求
在
上的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890c8f63263d8f5b547d2fb23604a489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f03f7f03fc83eedd93fcf9c5550bb81.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90b44f634764a59801f2091032df329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbb01a7f5e9861aa185c6c63fcd58c0.png)
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【推荐2】在直角坐标系
中,函数
的图像与
轴交于
两点,点
的坐标为
.
(1)证明:
;
(2)求过
三点的圆在
轴上截得的弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce07c693405e8508be7e23134c9c2b48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
(2)求过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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【推荐1】已知函数
.
(1)若函数
在
上是增函数,求实数a的取值范围;
(2)若
,求
时
的最小值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63aaa178677e179fd17fb87877ccb38.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3606fd3966dc72e0f8a32047945a86e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7b7c834d06f3e28a339db94690172.png)
您最近一年使用:0次
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解题方法
【推荐2】已知函数
.若对任意
,
恒成立,试求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b59dc951a5f0a79b2d3a4ea980a57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97148e04ca6a9f9dca0aba91ce4e1d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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