Question

Дано функцію f(x) = $\frac{1-x}{1+x}$ . Знайти f(x+1)

Answer 1

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

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