If `f(x)=(x-1)/(x+1)` then `f(2x)` is equal to

If f(x) = (x-1)/(x+1) , then f(2) is equal to

If f(x) = (x-1)/(x+1) , then f(2) is equal to

Let f(x)=(x-1)/(x+1) then f(1) is equal to

" If f(x)=(x)/(1+x) then f^(-1)(x) is equal to

If f(x)=(1)/(1-x), then f(f(f(x))) is equal to

If 2f (x +1) +f ((1)/( x +1))=2x, then f(2) is equal to

If f(x) = 1/(1-x) , then f(f(f(x))) is equal to

If f(x)=(x-1)/(x+1), then f(f(ax)) in terms of f(x) is equal to (a) (f(x)-1)/(a(f(x)-1)) (b) (f(x)+1)/(a(f(x)-1))(c)(f(x)-1)/(a(f(x)+1))(d)(f(x)+1)/(a(f(x)+1))

Consider the function f(x)=(x-1)/(x+1) What is f(2x) equal to ?