" 4.If `f(x)=(x+1)/(x-1)` then `f(x)+f((1)/(x)) `is

If f(x)=(x-1)/(x+1) then f^(-1)(x)=?

If f(x)=(x-1)/(x+1), then find f{f(x)}

If two roots of the equation (p-1)(x^(2)+x+1)^(2)-(p+1)(x^(4)+x^(2)+1)=0 are real and distinct and f(x)=(1-x)/(1+x) then f(f(x))+f(f((1)/(x))) is equal to

if f(x)=(x)/(x-1) then (f(a))/(f(a+1))=?

f(x)=(1-x)/(1+x) then f{f((1)/(x))}

If f(x)=(1-x)/(1+x) then f{f((1)/(x))}