如图,平行四边形ABCD中,AB=4,点D的坐标是(0,8),以点C为顶点的抛物线y=ax2+bx+c经过x轴上的点A,B.(1)确定b,c的值(2)指出该函数是由y=-2x²经过怎样的平移得到的?(3)若抛物线y=ax²+bx+c
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![如图,平行四边形ABCD中,AB=4,点D的坐标是(0,8),以点C为顶点的抛物线y=ax2+bx+c经过x轴上的点A,B.(1)确定b,c的值(2)指出该函数是由y=-2x²经过怎样的平移得到的?(3)若抛物线y=ax²+bx+c](/uploads/image/z/5233486-22-6.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%AD%2CAB%3D4%2C%E7%82%B9D%E7%9A%84%E5%9D%90%E6%A0%87%E6%98%AF%EF%BC%880%2C8%EF%BC%89%2C%E4%BB%A5%E7%82%B9C%E4%B8%BA%E9%A1%B6%E7%82%B9%E7%9A%84%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax2%2Bbx%2Bc%E7%BB%8F%E8%BF%87x%E8%BD%B4%E4%B8%8A%E7%9A%84%E7%82%B9A%2CB.%EF%BC%881%EF%BC%89%E7%A1%AE%E5%AE%9Ab%2Cc%E7%9A%84%E5%80%BC%EF%BC%882%EF%BC%89%E6%8C%87%E5%87%BA%E8%AF%A5%E5%87%BD%E6%95%B0%E6%98%AF%E7%94%B1y%3D-2x%26%23178%3B%E7%BB%8F%E8%BF%87%E6%80%8E%E6%A0%B7%E7%9A%84%E5%B9%B3%E7%A7%BB%E5%BE%97%E5%88%B0%E7%9A%84%3F%EF%BC%883%EF%BC%89%E8%8B%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax%26%23178%3B%2Bbx%2Bc)
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