求解一道关于二次函数的题目如图(1),抛物线y=ax^2-3ax+b经过A(-1,0),C(3,2)两点,与y轴于点D与x轴交于另一点B.(1)此抛物线的解析式.(2)若直线y=kx-1(k≠ 0)将四边形ABCD面积二等分,求k的值.
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![求解一道关于二次函数的题目如图(1),抛物线y=ax^2-3ax+b经过A(-1,0),C(3,2)两点,与y轴于点D与x轴交于另一点B.(1)此抛物线的解析式.(2)若直线y=kx-1(k≠ 0)将四边形ABCD面积二等分,求k的值.](/uploads/image/z/8809148-20-8.jpg?t=%E6%B1%82%E8%A7%A3%E4%B8%80%E9%81%93%E5%85%B3%E4%BA%8E%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E7%9A%84%E9%A2%98%E7%9B%AE%E5%A6%82%E5%9B%BE%EF%BC%881%29%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax%5E2-3ax%2Bb%E7%BB%8F%E8%BF%87A%EF%BC%88-1%2C0%EF%BC%89%2CC%EF%BC%883%2C2%EF%BC%89%E4%B8%A4%E7%82%B9%2C%E4%B8%8Ey%E8%BD%B4%E4%BA%8E%E7%82%B9D%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8E%E5%8F%A6%E4%B8%80%E7%82%B9B.%EF%BC%881%29%E6%AD%A4%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F.%EF%BC%882%EF%BC%89%E8%8B%A5%E7%9B%B4%E7%BA%BFy%3Dkx-1%28k%E2%89%A0+0%EF%BC%89%E5%B0%86%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E9%9D%A2%E7%A7%AF%E4%BA%8C%E7%AD%89%E5%88%86%2C%E6%B1%82k%E7%9A%84%E5%80%BC.)
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