设f(x+1⼀x)=x^2+1⼀x^2 则F(x)=

2024-12-16 01:52:15
推荐回答(2个)
回答1:

f(x+1/x)=(x+1/x)^2-2
所以f(X)=x^2-2
还可以用换元法设t=x+1/x

回答2:

f(x+1/x)=x^2+1/x^2=(x+1/x)^2-2
f(x)=x^2-2