10-11高三上·山东泰安·期中
1 . 已知△
的内角
所对的边分别为
且
.
(1) 若
, 求
的值;
(2) 若△
的面积
求
的值.
![](https://img.xkw.com/dksih/QBM/2010/10/19/1569859095560192/1569859100876800/STEM/bbba856dce5746c69140036aaa440e99.png)
![](https://img.xkw.com/dksih/QBM/2010/10/19/1569859095560192/1569859100876800/STEM/3d5341fc347b46e188ac8f15b45612a5.png)
![](https://img.xkw.com/dksih/QBM/2010/10/19/1569859095560192/1569859100876800/STEM/42efa33573784bb88cdf412696ca1498.png)
![](https://img.xkw.com/dksih/QBM/2010/10/19/1569859095560192/1569859100876800/STEM/71fd517758454f67a7048a82862a7828.png)
(1) 若
![](https://img.xkw.com/dksih/QBM/2010/10/19/1569859095560192/1569859100876800/STEM/ba619d63cba04599923ec8a995901cd1.png)
![](https://img.xkw.com/dksih/QBM/2010/10/19/1569859095560192/1569859100876800/STEM/2a4938a779a8454a9d76352d3a6e9570.png)
(2) 若△
![](https://img.xkw.com/dksih/QBM/2010/10/19/1569859095560192/1569859100876800/STEM/bbba856dce5746c69140036aaa440e99.png)
![](https://img.xkw.com/dksih/QBM/2010/10/19/1569859095560192/1569859100876800/STEM/9f4a45287c624e33aea48529c3958dd5.png)
![](https://img.xkw.com/dksih/QBM/2010/10/19/1569859095560192/1569859100876800/STEM/6ce5dbe23229450a971a3ab2c4a36fe9.png)
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2016-11-30更新
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633次组卷
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11卷引用:2011-2012学年福建省安溪一中、养正中学高二上学期期末考试文科数学
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12-13高二上·福建泉州·单元测试
名校
2 . 设
分别为椭圆C:
的左、右两个焦点,椭圆C上的点
到两焦点的距离之和等于4.
(1)求椭圆C的方程和焦点坐标;
(2)设点P是(1)中所得椭圆上的动点,
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e90064d012356de1877aa697cd6d6ac.png)
(1)求椭圆C的方程和焦点坐标;
(2)设点P是(1)中所得椭圆上的动点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055d3ab1ca889ea898296dfc1abf725b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
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12-13高二上·福建泉州·单元测试
3 . 已知等差数列
满足
.
(Ⅰ)求通项
;
(Ⅱ)设
是首项为1,公比为3的等比数列,求数列
的通项公式及其前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d36eb85d6408472943b1e2cd5f4f163.png)
(Ⅰ)求通项
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79768a4e3970a18741cee3fbd8bcbdad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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