平面直角坐标系中,已知抛物线经过a(-4,0),b(0,-4),c(2,0)三点.(1)求抛物线的解析式(2)若点m为第三象限内抛物线上一动点,点m的横坐标为M,△amb的面积为s,求s关于m的函数关系式,并求出s
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![平面直角坐标系中,已知抛物线经过a(-4,0),b(0,-4),c(2,0)三点.(1)求抛物线的解析式(2)若点m为第三象限内抛物线上一动点,点m的横坐标为M,△amb的面积为s,求s关于m的函数关系式,并求出s](/uploads/image/z/1806317-53-7.jpg?t=%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%BB%8F%E8%BF%87a%EF%BC%88-4%2C0%EF%BC%89%2Cb%EF%BC%880%2C-4%EF%BC%89%2Cc%EF%BC%882%2C0%29%E4%B8%89%E7%82%B9.%EF%BC%881%29%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%882%EF%BC%89%E8%8B%A5%E7%82%B9m%E4%B8%BA%E7%AC%AC%E4%B8%89%E8%B1%A1%E9%99%90%E5%86%85%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8A%E4%B8%80%E5%8A%A8%E7%82%B9%2C%E7%82%B9m%E7%9A%84%E6%A8%AA%E5%9D%90%E6%A0%87%E4%B8%BAM%2C%E2%96%B3amb%E7%9A%84%E9%9D%A2%E7%A7%AF%E4%B8%BAs%2C%E6%B1%82s%E5%85%B3%E4%BA%8Em%E7%9A%84%E5%87%BD%E6%95%B0%E5%85%B3%E7%B3%BB%E5%BC%8F%2C%E5%B9%B6%E6%B1%82%E5%87%BAs)
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