Question

f(x)=1-x/1+x . Знайти f(x+1)

Answer 1

f(x)=$\frac{1-x}{1+x}$
f(x+1)=$\frac{1-(x+1)}{1+(x+1)}$ =$\frac{1-x-1}{1+x+1}$ = $- \frac{x}{2+x}$

Answer 2

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