二次函数y=3/4x^2+bx+c,其图象对称轴为直线x=1,且经过点(2,-9/4).(2)设该图像与x轴交于点B,C两点(B点在C点的左侧),请在此二次函数x轴下方的图像上确定一点E,使△EBC的面积最大,并求出最大值.
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![二次函数y=3/4x^2+bx+c,其图象对称轴为直线x=1,且经过点(2,-9/4).(2)设该图像与x轴交于点B,C两点(B点在C点的左侧),请在此二次函数x轴下方的图像上确定一点E,使△EBC的面积最大,并求出最大值.](/uploads/image/z/6893767-55-7.jpg?t=%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3D3%2F4x%5E2%2Bbx%2Bc%2C%E5%85%B6%E5%9B%BE%E8%B1%A1%E5%AF%B9%E7%A7%B0%E8%BD%B4%E4%B8%BA%E7%9B%B4%E7%BA%BFx%3D1%2C%E4%B8%94%E7%BB%8F%E8%BF%87%E7%82%B9%EF%BC%882%2C-9%2F4%EF%BC%89.%282%29%E8%AE%BE%E8%AF%A5%E5%9B%BE%E5%83%8F%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9B%2CC%E4%B8%A4%E7%82%B9%EF%BC%88B%E7%82%B9%E5%9C%A8C%E7%82%B9%E7%9A%84%E5%B7%A6%E4%BE%A7%EF%BC%89%2C%E8%AF%B7%E5%9C%A8%E6%AD%A4%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0x%E8%BD%B4%E4%B8%8B%E6%96%B9%E7%9A%84%E5%9B%BE%E5%83%8F%E4%B8%8A%E7%A1%AE%E5%AE%9A%E4%B8%80%E7%82%B9E%2C%E4%BD%BF%E2%96%B3EBC%E7%9A%84%E9%9D%A2%E7%A7%AF%E6%9C%80%E5%A4%A7%2C%E5%B9%B6%E6%B1%82%E5%87%BA%E6%9C%80%E5%A4%A7%E5%80%BC.)
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