2011·广东惠州·三模
名校
1 . 已知△ABC中,点A、B、C的坐标依次是A(2,-1),B(3,2),C(-3,-1),BC边上的高为AD,则
的坐标是:_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d036188ce294e3c7427d0b7d2294fd2.png)
您最近一年使用:0次
解题方法
2 . 已知向量
=(-1,1),向量
=(3,t),若
∥(
+
),则t=________ .
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975037546496/1572975043551232/STEM/84d878ac0df04833a50c12bb02ed3a37.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975037546496/1572975043551232/STEM/a68eec14226140f08a99fa2b395cf7ba.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975037546496/1572975043551232/STEM/a68eec14226140f08a99fa2b395cf7ba.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975037546496/1572975043551232/STEM/84d878ac0df04833a50c12bb02ed3a37.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975037546496/1572975043551232/STEM/a68eec14226140f08a99fa2b395cf7ba.png?resizew=12)
您最近一年使用:0次