一道函数问题(应该很简单,本人处于入门阶段)已知二次函数f(x)的二次项系数为a,且不等式f(x)>-2x的解集为(1,3) (1)若方程f(x)+6a=0有两个相等的根,求f(x)的解析式; (2)若f(x)的最大值为正数,求a的
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![一道函数问题(应该很简单,本人处于入门阶段)已知二次函数f(x)的二次项系数为a,且不等式f(x)>-2x的解集为(1,3) (1)若方程f(x)+6a=0有两个相等的根,求f(x)的解析式; (2)若f(x)的最大值为正数,求a的](/uploads/image/z/12199872-48-2.jpg?t=%E4%B8%80%E9%81%93%E5%87%BD%E6%95%B0%E9%97%AE%E9%A2%98%28%E5%BA%94%E8%AF%A5%E5%BE%88%E7%AE%80%E5%8D%95%2C%E6%9C%AC%E4%BA%BA%E5%A4%84%E4%BA%8E%E5%85%A5%E9%97%A8%E9%98%B6%E6%AE%B5%29%E5%B7%B2%E7%9F%A5%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0f%28x%29%E7%9A%84%E4%BA%8C%E6%AC%A1%E9%A1%B9%E7%B3%BB%E6%95%B0%E4%B8%BAa%2C%E4%B8%94%E4%B8%8D%E7%AD%89%E5%BC%8Ff%28x%29%3E-2x%E7%9A%84%E8%A7%A3%E9%9B%86%E4%B8%BA%281%2C3%29+%281%29%E8%8B%A5%E6%96%B9%E7%A8%8Bf%28x%29%2B6a%3D0%E6%9C%89%E4%B8%A4%E4%B8%AA%E7%9B%B8%E7%AD%89%E7%9A%84%E6%A0%B9%2C%E6%B1%82f%28x%29%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%EF%BC%9B+%282%29%E8%8B%A5f%28x%29%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%BA%E6%AD%A3%E6%95%B0%2C%E6%B1%82a%E7%9A%84)
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