1 . 已知向量
与
,其中
.
(1)若
,求
的值;
(2)记函数
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b663a5cee0173bf07263873411b745ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91d2481a1bbd0caf20caa80117cd99ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/507d33159cca336fc25764e99789886f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb58883caf5c8ca1e94389839d294b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c5a05a11f731194a845e68a0479ce4.png)
(2)记函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc1525aee9019a25cf71dc6054ec1ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a6431a888feea8314adf35bb10533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
您最近一年使用:0次
2019-06-13更新
|
1162次组卷
|
2卷引用:【校级联考】浙江省9+1高中联盟2018-2019学年高二(下)期中考试数学试题
解题方法
2 . 已知椭圆
的右焦点为
,
为短轴的一个端点,且
,
的面积为1(其中
为坐标原点).
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433593655296/1572433599807488/STEM/79da0cf4c917401e89e201a9aab5f304.png)
(1)求椭圆的方程;
(2)若
,
分别是椭圆长轴的左、右端点,动点
满足
,连接
,交椭圆于点
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ec56b59d6f2654570c2b5c4fd13a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070cc75712a7a5380b378dc662715cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e922914734ef216cc4e43876bd4370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433593655296/1572433599807488/STEM/79da0cf4c917401e89e201a9aab5f304.png)
(1)求椭圆的方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b8a53e62589194366be7a831a5fc4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0b812563c720022bc08c33f729bfcd8.png)
您最近一年使用:0次
2016-12-04更新
|
1352次组卷
|
5卷引用:2015-2016学年浙江省慈溪中学高二上期中数学试卷
2012高二下·浙江嘉兴·学业考试
解题方法
3 . 在
中,内角
,
,
所对的边分别为
,已知
.
(1) 求
的值;
(2) 若
是钝角,求
的取值范围.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb79f36c0b485b9552f59f26b69b17ee.png)
(1) 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
您最近一年使用:0次