x=y=0
f(0)=2f(0)+0
f(0)=0
令y=0
f(x)=2f(0)+x^2+3x
=x^2+3x
對(duì)任意的實(shí)數(shù)x,y,f(x+y)=2f(y)+x^2+2xy-y^2+3x-3y,求f(x)
對(duì)任意的實(shí)數(shù)x,y,f(x+y)=2f(y)+x^2+2xy-y^2+3x-3y,求f(x)
其他人氣：204 ℃時(shí)間：2020-03-28 12:29:31
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