(不是为了做作业,而是为了弄懂,)如图,抛物线y=ax²+bx+c与x轴交于A,B两点,与y轴负半轴交于点C,且OA=1,OB=4,OC=2,直线y=2/3x与抛物线在第三象限内交于点D.(1)求抛物线的解析式;(2)在直线A
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![(不是为了做作业,而是为了弄懂,)如图,抛物线y=ax²+bx+c与x轴交于A,B两点,与y轴负半轴交于点C,且OA=1,OB=4,OC=2,直线y=2/3x与抛物线在第三象限内交于点D.(1)求抛物线的解析式;(2)在直线A](/uploads/image/z/6880425-33-5.jpg?t=%EF%BC%88%E4%B8%8D%E6%98%AF%E4%B8%BA%E4%BA%86%E5%81%9A%E4%BD%9C%E4%B8%9A%2C%E8%80%8C%E6%98%AF%E4%B8%BA%E4%BA%86%E5%BC%84%E6%87%82%2C%EF%BC%89%E5%A6%82%E5%9B%BE%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax%26%23178%3B%2Bbx%2Bc%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA%2CB%E4%B8%A4%E7%82%B9%2C%E4%B8%8Ey%E8%BD%B4%E8%B4%9F%E5%8D%8A%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9C%2C%E4%B8%94OA%3D1%2COB%3D4%2COC%3D2%2C%E7%9B%B4%E7%BA%BFy%3D2%2F3x%E4%B8%8E%E6%8A%9B%E7%89%A9%E7%BA%BF%E5%9C%A8%E7%AC%AC%E4%B8%89%E8%B1%A1%E9%99%90%E5%86%85%E4%BA%A4%E4%BA%8E%E7%82%B9D.%EF%BC%881%EF%BC%89%E6%B1%82%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%EF%BC%9B%EF%BC%882%EF%BC%89%E5%9C%A8%E7%9B%B4%E7%BA%BFA)
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