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已知y=f(x)是二次函数,若方程f(x)=0有两个相等的实根,且f(x)'=2
已知y=f(x)是二次函数,若方程f(x)=0有两个相等的实根,且f(x)'=2
发布时间:2020-07-14 11:07:59
已知y=f(x)是二次函数,若方程f(x)=0有两个相等的实根,且f(x)'=2x+2,则函数f(x)的表达式是A.f(x)=x2-2x+1B.f(x)=2x2+2x+1C.f(x)=x2+2x+1D.
网友回答
C解析分析:利用导数运算以及△是否等于0判断是否符合条件,直接求出
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