若三角形ABC的一顶点为A(3,-1),角B,角C的平分线所在直线的方程为x=0和y=x,则直线BC的方程是?作点A关于直线x=0的对称点A1,不难求得A1(-3,-1) 作点A关于直线x=y的对称点A2,不难求得A2(1,-3) A1A2所在为什
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![若三角形ABC的一顶点为A(3,-1),角B,角C的平分线所在直线的方程为x=0和y=x,则直线BC的方程是?作点A关于直线x=0的对称点A1,不难求得A1(-3,-1) 作点A关于直线x=y的对称点A2,不难求得A2(1,-3) A1A2所在为什](/uploads/image/z/3708801-9-1.jpg?t=%E8%8B%A5%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E4%B8%80%E9%A1%B6%E7%82%B9%E4%B8%BAA%283%2C-1%29%2C%E8%A7%92B%2C%E8%A7%92C%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%E6%89%80%E5%9C%A8%E7%9B%B4%E7%BA%BF%E7%9A%84%E6%96%B9%E7%A8%8B%E4%B8%BAx%3D0%E5%92%8Cy%3Dx%2C%E5%88%99%E7%9B%B4%E7%BA%BFBC%E7%9A%84%E6%96%B9%E7%A8%8B%E6%98%AF%3F%E4%BD%9C%E7%82%B9A%E5%85%B3%E4%BA%8E%E7%9B%B4%E7%BA%BFx%3D0%E7%9A%84%E5%AF%B9%E7%A7%B0%E7%82%B9A1%2C%E4%B8%8D%E9%9A%BE%E6%B1%82%E5%BE%97A1%28-3%2C-1%29+%E4%BD%9C%E7%82%B9A%E5%85%B3%E4%BA%8E%E7%9B%B4%E7%BA%BFx%3Dy%E7%9A%84%E5%AF%B9%E7%A7%B0%E7%82%B9A2%2C%E4%B8%8D%E9%9A%BE%E6%B1%82%E5%BE%97A2%281%2C-3%29+A1A2%E6%89%80%E5%9C%A8%E4%B8%BA%E4%BB%80)
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