已知点A(1,-2),若向量AB与a=(2,3)反向,向量AB的长度=2根号13,求点B的坐标我已经算出了一个方程,(x-1)^2+(y+2)^2=52。另一个老师写的是是2/(X-1)=3/(Y+2),想问怎么求的。
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![已知点A(1,-2),若向量AB与a=(2,3)反向,向量AB的长度=2根号13,求点B的坐标我已经算出了一个方程,(x-1)^2+(y+2)^2=52。另一个老师写的是是2/(X-1)=3/(Y+2),想问怎么求的。](/uploads/image/z/3768161-41-1.jpg?t=%E5%B7%B2%E7%9F%A5%E7%82%B9A%281%2C-2%29%2C%E8%8B%A5%E5%90%91%E9%87%8FAB%E4%B8%8Ea%3D%282%2C3%29%E5%8F%8D%E5%90%91%2C%E5%90%91%E9%87%8FAB%E7%9A%84%E9%95%BF%E5%BA%A6%3D2%E6%A0%B9%E5%8F%B713%2C%E6%B1%82%E7%82%B9B%E7%9A%84%E5%9D%90%E6%A0%87%E6%88%91%E5%B7%B2%E7%BB%8F%E7%AE%97%E5%87%BA%E4%BA%86%E4%B8%80%E4%B8%AA%E6%96%B9%E7%A8%8B%EF%BC%8C%EF%BC%88x-1%EF%BC%89%5E2%2B%28y%2B2%29%5E2%3D52%E3%80%82%E5%8F%A6%E4%B8%80%E4%B8%AA%E8%80%81%E5%B8%88%E5%86%99%E7%9A%84%E6%98%AF%E6%98%AF2%2F%EF%BC%88X-1%EF%BC%89%3D3%2F%EF%BC%88Y%2B2%EF%BC%89%EF%BC%8C%E6%83%B3%E9%97%AE%E6%80%8E%E4%B9%88%E6%B1%82%E7%9A%84%E3%80%82)
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