解答题-证明题 困难0.15 引用2 组卷3337
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
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