已知点C是点A(-1,2)关于点B(3,-1)对称的点(1)求点c的坐标(2)求AB两点间的距离求过点A(-1,2)和点B(2,4)的直线的方程。
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![已知点C是点A(-1,2)关于点B(3,-1)对称的点(1)求点c的坐标(2)求AB两点间的距离求过点A(-1,2)和点B(2,4)的直线的方程。](/uploads/image/z/11344463-71-3.jpg?t=%E5%B7%B2%E7%9F%A5%E7%82%B9C%E6%98%AF%E7%82%B9A%28-1%2C2%29%E5%85%B3%E4%BA%8E%E7%82%B9B%283%2C-1%29%E5%AF%B9%E7%A7%B0%E7%9A%84%E7%82%B9%EF%BC%881%EF%BC%89%E6%B1%82%E7%82%B9c%E7%9A%84%E5%9D%90%E6%A0%87%EF%BC%882%EF%BC%89%E6%B1%82AB%E4%B8%A4%E7%82%B9%E9%97%B4%E7%9A%84%E8%B7%9D%E7%A6%BB%E6%B1%82%E8%BF%87%E7%82%B9A%28-1%2C2%29%E5%92%8C%E7%82%B9B%282%2C4%29%E7%9A%84%E7%9B%B4%E7%BA%BF%E7%9A%84%E6%96%B9%E7%A8%8B%E3%80%82)
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