Question

if f(X) =(x-1)/(X+1) then f(f(X)) is equal to​

Answer 1

Step-by-step explanation:

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