(1)f 是奇函数,包括了f(0)=0
(2) f(x^3)=xf(x^2)=x^2f(x) ... 令y=0 及 y=x^2
(3) 令f(x)=g(x)+f(1)x. g(x)满足同样方程且g(1)=0. 令y=1,化简,g(x)=0
(1)f 是奇函数,包括了f(0)=0
(2) f(x^3)=xf(x^2)=x^2f(x) ... 令y=0 及 y=x^2
(3) 令f(x)=g(x)+f(1)x. g(x)满足同样方程且g(1)=0. 令y=1,化简,g(x)=0
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