若不同四点A(-1,0),B(-3,3),C(5,0),D(a,3)在同一个圆上,求a的值 请用公式推,勿用图像法最好能求出圆的方程(像“因A、B都在x轴上,那么圆心就因该在AB的中垂线上,又AB中垂线为x=2;另外CD//AB
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![若不同四点A(-1,0),B(-3,3),C(5,0),D(a,3)在同一个圆上,求a的值 请用公式推,勿用图像法最好能求出圆的方程(像“因A、B都在x轴上,那么圆心就因该在AB的中垂线上,又AB中垂线为x=2;另外CD//AB](/uploads/image/z/11563510-22-0.jpg?t=%E8%8B%A5%E4%B8%8D%E5%90%8C%E5%9B%9B%E7%82%B9A%EF%BC%88-1%2C0%EF%BC%89%2CB%EF%BC%88-3%2C3%EF%BC%89%2CC%285%2C0%29%2CD%28a%2C3%EF%BC%89%E5%9C%A8%E5%90%8C%E4%B8%80%E4%B8%AA%E5%9C%86%E4%B8%8A%2C%E6%B1%82a%E7%9A%84%E5%80%BC+%E8%AF%B7%E7%94%A8%E5%85%AC%E5%BC%8F%E6%8E%A8%2C%E5%8B%BF%E7%94%A8%E5%9B%BE%E5%83%8F%E6%B3%95%E6%9C%80%E5%A5%BD%E8%83%BD%E6%B1%82%E5%87%BA%E5%9C%86%E7%9A%84%E6%96%B9%E7%A8%8B%EF%BC%88%E5%83%8F%E2%80%9C%E5%9B%A0A%E3%80%81B%E9%83%BD%E5%9C%A8x%E8%BD%B4%E4%B8%8A%2C%E9%82%A3%E4%B9%88%E5%9C%86%E5%BF%83%E5%B0%B1%E5%9B%A0%E8%AF%A5%E5%9C%A8AB%E7%9A%84%E4%B8%AD%E5%9E%82%E7%BA%BF%E4%B8%8A%2C%E5%8F%88AB%E4%B8%AD%E5%9E%82%E7%BA%BF%E4%B8%BAx%3D2%EF%BC%9B%E5%8F%A6%E5%A4%96CD%2F%2FAB)
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