已知X≠0函数F(X)满足F(X+1/X)=x2+1/X2求Fx
问题描述:
已知X≠0函数F(X)满足F(X+1/X)=x2+1/X2求Fx
答
F(X+1/X)=x2+1/X2
=(X+1/X)^2-2
令X+1/X=t
即f(t)=t^2-2
f(x)=x^2-2