已知函数
.
(1)求函数
的单调增区间;
(2)
的内角
,
,
所对的边分别是
,
,
,若
,
,且
的面积为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6768774418335d7fe592ae165c6df970.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa6cf5d8e7ea4121a7b3d01731ec3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
更新时间:2017-10-10 14:38:25
|
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】在直角坐标系xOy中,直线l经过点P(−2,0),其倾斜角为,在以原点O为极点,x轴非负半轴为极轴的极坐标系中(取相同的长度单位),曲线C的极坐标方程为
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(1)若直线l与曲线C有公共点,求倾斜角的取值范围;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9976461eb778c7068c7fb4578e73967e.png)
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【推荐2】已知函数
.
(1)不画图,说明
的图象经过怎样的变换可得到
的图象;
(2)当
时,求函数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2203a9f69e0dea386cc7196de9babb6.png)
(1)不画图,说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c3049a6fa96b0ed1f3b6f6528a2ca.png)
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【推荐3】若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
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【推荐1】在非钝角
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,
,
所对的边分别为
,
,
,已知
.
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,
,求
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![](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)
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![](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/a55fa17b8ca21ed5068b487f57910022.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56be0c0cdf85c8dd280e8effbc230b3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa694fa8c2a39f0b9e9abdde51805e8.png)
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【推荐2】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de6e1389b87a903f0cd149bf2bac4f0e.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c8890878a53ac3c2e90ae738166eff.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐3】如图,某市在两条直线公路
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)问当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】△
的内角A,B,C的对边分别为a,b,c,已知
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(1)求证:a,b,c成等差数列;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b88698a25bfceffe43b35e19f1e8dad.png)
(1)求证:a,b,c成等差数列;
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【推荐1】已知函数
.
(1)求函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d38381bfb643d171aa6cd027d5643e8.png)
(1)求函数
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(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42da75d79d91b91c731b1dc2aac02ed0.png)
的最小正周期为T.若
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的图象关于直线
对称.
(1)求函数
的单调增区间;
(2)求函数
在区间
上的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42da75d79d91b91c731b1dc2aac02ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff46406cf7f298db70f81da8ea0ea4e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f0b1d2ba8f0c5670f04456e65c877a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c6cb0cc172657611e286e7fa669584.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c6c37ce441a8ed77c8e3953e8fe1f.png)
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【推荐3】函数
的一段图象如图所示.将函数
的图象向右平移
个单位长度,可得到函数
的图象,且图象关于原点对称.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/ba6376ae-1694-49f0-860b-9f0bc2cc633c.png?resizew=170)
(1)求
的解析式并求其单调递增区间;
(2)求实数
的最小值,并写出此时
的表达式;
(3)在(2)的条件下,设
,关于
的函数
在区间
上的最小值为-2,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703b4493b66a538140dd12bb3b268a7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93a232c88870d213a7b74a796a1ff4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/ba6376ae-1694-49f0-860b-9f0bc2cc633c.png?resizew=170)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(3)在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8d4f3b4cf66d60d4352cedaf6a0018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51f8dea12d1325fd657eb9875823b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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