设二次函数y=ax^2+bx+c(a,b,c均为实数)与x轴交于A,B两点,与y轴交于点C,且抛物线上所有的点中到直线y=-2的最小距离为1.若△ABC是直角三角形,则△ABC面积的最大值是A:3 B:2 C:根号3 D:1
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![设二次函数y=ax^2+bx+c(a,b,c均为实数)与x轴交于A,B两点,与y轴交于点C,且抛物线上所有的点中到直线y=-2的最小距离为1.若△ABC是直角三角形,则△ABC面积的最大值是A:3 B:2 C:根号3 D:1](/uploads/image/z/5410940-68-0.jpg?t=%E8%AE%BE%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3Dax%5E2%2Bbx%2Bc%28a%2Cb%2Cc%E5%9D%87%E4%B8%BA%E5%AE%9E%E6%95%B0%29%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%E4%BA%A4%E4%BA%8E%E7%82%B9C%2C%E4%B8%94%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8A%E6%89%80%E6%9C%89%E7%9A%84%E7%82%B9%E4%B8%AD%E5%88%B0%E7%9B%B4%E7%BA%BFy%3D-2%E7%9A%84%E6%9C%80%E5%B0%8F%E8%B7%9D%E7%A6%BB%E4%B8%BA1.%E8%8B%A5%E2%96%B3ABC%E6%98%AF%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E5%88%99%E2%96%B3ABC%E9%9D%A2%E7%A7%AF%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E6%98%AFA%3A3+B%3A2+C%3A%E6%A0%B9%E5%8F%B73+D%3A1)
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