已知二次函数
.(要求:画出函数图像)
(1)当
时,求
的最值;
(2)当
时,求
的最值;
(3)当
时,求
的最小值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a359fa56fb08d642d9486aa06aa40cfb.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626d8e8bba19df463a1b6f4e4d2377cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7924ce4a09eb946ca48c553e52693f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcd78ddf3856a9100e71ee5655a0c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3466b71d1d9117438ed50388a57d9397.png)
更新时间:2021-11-24 21:20:17
|
【知识点】 求二次函数的值域或最值
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解答题-问答题
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较易
(0.85)
解题方法
【推荐1】若函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d59add21497591a0d9c5da663935fb.png)
(1)求
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d59add21497591a0d9c5da663935fb.png)
(1)求
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3497efc308cbc67c6969b33f29d361.png)
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解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐2】已知向量
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,若存在非零实数
,
使得
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,且
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