名校
1 . 设x,y∈R,向量
=(x,2),
=(1,y),
=(2,-6),且
,
,则
=____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a254b4db699bfe1d8b551d2e943276e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c250094127e2b3c878d68213b60407.png)
您最近一年使用:0次
2011·山东济南·一模
解题方法
2 . 如图,在△ABC中,
=![](https://img.xkw.com/dksih/QBM/2011/2/27/1570016886710272/1570016891936768/STEM/64b4e553f6704bf98a713ff7c525bc7a.png?resizew=15)
,P是BN上的一点,若
=m
+![](https://img.xkw.com/dksih/QBM/2011/2/27/1570016886710272/1570016891936768/STEM/c62ffe76cbad41c0ae8a6b196c0faaa0.png?resizew=20)
,则实数
的值为___________ .
![](https://img.xkw.com/dksih/QBM/2011/2/27/1570016886710272/1570016891936768/STEM/68013629082a41a18c2e40f492e2062f.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2011/2/27/1570016886710272/1570016891936768/STEM/64b4e553f6704bf98a713ff7c525bc7a.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2011/2/27/1570016886710272/1570016891936768/STEM/6fc9ea46f82e4f328d96a1ea55cb5ae2.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2011/2/27/1570016886710272/1570016891936768/STEM/eac4d8b79ed04c1cba6c1ba6f021d619.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2011/2/27/1570016886710272/1570016891936768/STEM/8a4413c134b34cf2b082673a51285f27.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2011/2/27/1570016886710272/1570016891936768/STEM/c62ffe76cbad41c0ae8a6b196c0faaa0.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2011/2/27/1570016886710272/1570016891936768/STEM/58535105944b485fafd8638252fbcdfb.png?resizew=28)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/2012/1/2/1570671644237824/1570671649628160/STEM/3c9ae504d23f47b085b9385cab810466.png?resizew=129)
您最近一年使用:0次