在平面直角坐标系中,已知抛物线y=(-1/2)x^2+bx+c(b,c为常数)的顶点P,等腰三角形ABC的定点A在的坐标为(0.-1),C点的坐标为(4,3).直角顶点B在第四象限.(1).如图,若该抛物线经过A,B两点,求该
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![在平面直角坐标系中,已知抛物线y=(-1/2)x^2+bx+c(b,c为常数)的顶点P,等腰三角形ABC的定点A在的坐标为(0.-1),C点的坐标为(4,3).直角顶点B在第四象限.(1).如图,若该抛物线经过A,B两点,求该](/uploads/image/z/14318976-48-6.jpg?t=%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D%EF%BC%88-1%2F2%EF%BC%89x%5E2%2Bbx%2Bc%28b%2Cc%E4%B8%BA%E5%B8%B8%E6%95%B0%29%E7%9A%84%E9%A1%B6%E7%82%B9P%2C%E7%AD%89%E8%85%B0%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E5%AE%9A%E7%82%B9A%E5%9C%A8%E7%9A%84%E5%9D%90%E6%A0%87%E4%B8%BA%EF%BC%880.-1%EF%BC%89%2CC%E7%82%B9%E7%9A%84%E5%9D%90%E6%A0%87%E4%B8%BA%EF%BC%884%2C3%EF%BC%89.%E7%9B%B4%E8%A7%92%E9%A1%B6%E7%82%B9B%E5%9C%A8%E7%AC%AC%E5%9B%9B%E8%B1%A1%E9%99%90.%EF%BC%881%EF%BC%89.%E5%A6%82%E5%9B%BE%2C%E8%8B%A5%E8%AF%A5%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%BB%8F%E8%BF%87A%2CB%E4%B8%A4%E7%82%B9%2C%E6%B1%82%E8%AF%A5)
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