设函数
.
(1)求不等式
的解集;
(2)若函数
最小值为m,设a,
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83885a8e289d2f6d47ae4c6d65472761.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990d3feee85e869ea9ab561ff63d46a2.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6964f26e70afe3d425ea971d3212bb9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20aed978313b6896ef5a1b01e8aaf6be.png)
更新时间:2020-09-26 10:46:21
|
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解答题
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适中
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名校
解题方法
【推荐1】设
分别为
三个内角
的对边,若向量
,且
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(1)求
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(2)求
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2eae7aada5ada75044dcc4c2e81b1ab.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/203d3b13875c94f1b6498fa29eb17708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
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适中
(0.65)
名校
解题方法
【推荐2】
的内角A,B,C的对边分别为a,b,c,且
.
(1)求C;
(2)若D为
边上一点,
,且
,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ae38ad8f4aa8cbbdeeb6c2ef8dbbf5.png)
(1)求C;
(2)若D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/144bdaa4ffa5301d348af01d35ab084b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-证明题
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适中
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【推荐3】已知
,
,
均为正数,且
.
(1)是否存在
,
,
,使得
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(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a57e060f61f7efa54982bda67db483a.png)
(1)是否存在
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5882aba406145a4755d3bc184b8aee30.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31270f0a9cb69c97225271fb354847db.png)
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适中
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【推荐1】已加
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/067847202331db41f25d3214484f902e.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abdaffa9c15517afe6d7ba6488f88f67.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0384a0466920e5bf00231a5c5bf77969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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适中
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【推荐2】选修4-5:不等式选讲
已知
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,
.
(1)求使得
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(2)求证:当
时,
对满足条件的所有
都成立.
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a173e6a0306830db59769f92ee621b.png)
(1)求使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb1dc30d4b297c6d5d0d6d91eab1e3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc10580ae53f90dfccd9816789fd8861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d62ee8e92bba4297f666d91c3a00a56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
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