已知向量
,
.
(Ⅰ)求证
;
(Ⅱ)若存在不等于0的实数k和t, 使
,
满足
试求此时
的最小值.
![](https://img.xkw.com/dksih/QBM/2015/3/11/1571996161892352/1571996167847936/STEM/0e9fc92dffb1452b87b0b9d53fc6dc8c.png)
![](https://img.xkw.com/dksih/QBM/2015/3/11/1571996161892352/1571996167847936/STEM/c76ec8da26c74c07a96365acb69eb745.png)
(Ⅰ)求证
![](https://img.xkw.com/dksih/QBM/2015/3/11/1571996161892352/1571996167847936/STEM/f4c495bc8961436da3e7d498c56c50d1.png)
(Ⅱ)若存在不等于0的实数k和t, 使
![](https://img.xkw.com/dksih/QBM/2015/3/11/1571996161892352/1571996167847936/STEM/a242afa71af4439fbcc30d8997512f2b.png)
![](https://img.xkw.com/dksih/QBM/2015/3/11/1571996161892352/1571996167847936/STEM/e2211ac451bd4ce0a55bb43fe8743453.png)
![](https://img.xkw.com/dksih/QBM/2015/3/11/1571996161892352/1571996167847936/STEM/6ca182d147c94eacb0cfea6c6a95ed72.png)
![](https://img.xkw.com/dksih/QBM/2015/3/11/1571996161892352/1571996167847936/STEM/85869c9b1d9b452f957a679752891da2.png)
14-15高一上·云南玉溪·期末 查看更多[2]
更新时间:2016-12-03 09:37:18
|
【知识点】 平面向量的基本定理及坐标表示
相似题推荐
【推荐1】已知
、
是函数
的图象上的任意两点,点
在直线
上,且
.
(1)求
的值及
的值;
(2)已知
,当
时,
,设
,
数列
的前
项和,若存在 正整数
,
,使得不等式
成立,求
和
的值;
(3)在(2)的条件下,设
,求所有可能的乘积
的和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ebcde3bc579cc3e31c9fe7c1ae3e032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e43f2bfcbef70a5a6e19ef792fa60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c72bc49a2eafb73fb3297e1304923c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a21434554a6b14633fd06e3186e7c0e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6e75677951ef1388f76aee5a779149.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d33d9dd40d026e06bc3970d29db9bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d7875482ed1d2b2f82bd2d8f1df8bd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5310457751b485a5312fb78fca8a6dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07404ab51f404f9411f79bd4f1fde654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e81078b69a93798f4451f6ef3f764a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e5849ca5126de3399c78e9ef3ba753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bb9839c329dc48b68017050994478e.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐2】如图,A,B是单位圆上的相异两定点(
为圆心),
(
),点C为单位圆上的动点,线段AC交线段
于点M(点M异于点
、B),记
的面积为
.
,求
的表达式;
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72bf0fce80daad394f2a9d013829c5c.png)
①求
的取值范围;
②设
,记
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7e00f8bacce4d649b535449f04568c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b992104248a854e6e033c26602aff813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3076feb932e8ae5fb4b22d7d71808e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5224a7da7fe6bc28971ce4c277f88588.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72bf0fce80daad394f2a9d013829c5c.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6da9ea780ba5e54f3be57b4a7bb12b1.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578e7f26b76790984b11ee825b5632be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d96d835be0e0461b12e515b28cc8d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82a1224e47f31ecdfffd328d5a3ab6d.png)
您最近一年使用:0次