由已知,f(1)=a+b+c=0 ,所以 c=-a-b,因此 f(-2)=4a-2b+c=3(a-b).
1)若 b>a ,3(a-b)
已知函數(shù)fx=ax^2+bx+c,f1=0,則b大于2a是f(-2)小于0的什么條件
已知函數(shù)fx=ax^2+bx+c,f1=0,則b大于2a是f(-2)小于0的什么條件
數(shù)學人氣:661 ℃時間:2020-05-02 19:14:46
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