Question

f(x)与f(1/x)什么关系

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

Answer 1

F(X)=X^2/(1+X^2)=(1+X^2-1)/(1+X^2)=1-[1/(1+X^2)]
将上式化简的到最后值X替换成1/X
F(1/X)=1-|/[|+|/(|/X^2)]=
|-|/[(x^2+|)/x^2]=|/(x^2+|)

Answer 2

f(x)+f(1/x)=1

Answer 3

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