如图,已知抛物线(二次函数图象)与x轴交于原点O及点C(6,0)两点,与直线y=kx+b交于A(1,m),B(4,8)两点(1)求直线和抛物线的解析式(2)求△OAB的面积,并判断在抛物线上是否存在这样的点D,使S
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![如图,已知抛物线(二次函数图象)与x轴交于原点O及点C(6,0)两点,与直线y=kx+b交于A(1,m),B(4,8)两点(1)求直线和抛物线的解析式(2)求△OAB的面积,并判断在抛物线上是否存在这样的点D,使S](/uploads/image/z/12528209-65-9.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BF%EF%BC%88%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E5%9B%BE%E8%B1%A1%EF%BC%89%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8E%E5%8E%9F%E7%82%B9O%E5%8F%8A%E7%82%B9C%EF%BC%886%2C0%EF%BC%89%E4%B8%A4%E7%82%B9%2C%E4%B8%8E%E7%9B%B4%E7%BA%BFy%3Dkx%2Bb%E4%BA%A4%E4%BA%8EA%EF%BC%881%2Cm%EF%BC%89%2CB%EF%BC%884%2C8%EF%BC%89%E4%B8%A4%E7%82%B9%281%29%E6%B1%82%E7%9B%B4%E7%BA%BF%E5%92%8C%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%282%29%E6%B1%82%E2%96%B3OAB%E7%9A%84%E9%9D%A2%E7%A7%AF%2C%E5%B9%B6%E5%88%A4%E6%96%AD%E5%9C%A8%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8A%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E8%BF%99%E6%A0%B7%E7%9A%84%E7%82%B9D%2C%E4%BD%BFS)
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