在①
,②函数
的最小值为
,③
这三个条件中任选一个,补充在下面问题中,并解答.
在
中,内角
,
,
所对的边分别为
,
,
,___________.
(1)求
;
(2)若
,且
的平分线上的点
满足
,求
.
注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761e351421abfbfb2e3adcc1cdce06e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aadb8de0e200d6e5411fe4b072cac5b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e3d87be9f706832ef25537d78a201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9c86d0c65e684a0e7b3dd6fc6f47d0.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a964d46001dc6cb40e785736fb49964e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
注:如果选择多个条件分别解答,按第一个解答计分.
2022·全国·模拟预测 查看更多[2]
更新时间:2022-05-18 06:11:56
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适中
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解题方法
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
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【推荐2】设△ABC的内角A,B,C所对的边分别为a,b,c,在以下①、②、③中选择一个作为条件,并加以解答,如果①、②、③都做,则按①给分.
①向量
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③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18242efb0b3c3c1f30dfe6cd6918d42f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90931e663f5db43a81fbec2d15c18e2c.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b19988d792b5252222f0a7acf7ef5fd.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18242efb0b3c3c1f30dfe6cd6918d42f.png)
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解答题-问答题
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适中
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解题方法
【推荐1】在
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解答题-问答题
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适中
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12931401ad36f7dba4738857d37bcad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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