已知向量
,
,函数
,
R.
(1)求
表达式;
(2)若
的最小值为
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd1ba29f693f612cf08e93808207d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164b8d0d1f6a2229153ec5bbf3a89e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e11f586d0e85987da9fb2efb2a9678f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e951ae62fd8222f561e8d616779d36.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2022-04-10 11:14:52
|
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解答题-问答题
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适中
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【推荐2】已知函数
(
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(1)讨论函数
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(2)当
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上有实根,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841114e3c57c9a4251c425b0492761c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1376168658dbe7f5b7f4d75fb1db545a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】在①
;②
两个条件中任选一个,补充在下面的问题中,并解答该问题.在
中,内角
所对的边分别是
,且______.
(1)求角
的大小;
(2)若点
满足
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,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d035afa04624216ca741ebff1e841c5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a393b5433b7bba69dea4a648692af7e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba1e7a657ed134e68efd159b606620f.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5001a96bebb4ee8781ede88b19c0fceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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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2】在①
且
,②
,③
这三个条件中任选一个,补充在下面问题中,并解答该问题.
问题:锐角
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(1)求A;
(2)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e62315a213f2c15d3a345c7ac5396c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8391a30a191b22e483db135fd476cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ede0a9a3bd8f24316247a5a0cd60adb.png)
问题:锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4c08559eb294e94c1ecc9cb1cf4720.png)
(1)求A;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a5801e8be81aae66c47cc058fe370c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ecb4859f30058f43abb25d687bb47c5.png)
(2)若
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【推荐2】已知向量
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(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb34f494e53bbb24dddabb454e4827b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48062a415d81f451051af234dfa44774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce485410257c9c1fae9d87ce3e44cc8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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【推荐3】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a8ccd9e4df320e3a510b1152553ac3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab30faa78cc53c104f61b1cd906c365.png)
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适中
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【推荐3】已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4caee21c29aa2410ea04b3fc2d80cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/912c304a988b21af716bee0f51c57241.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29f5020d133f458912dc3da22b8127d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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