If `f(x+1/x) = x-1/x` then `f(x)=`

If f(x+1/x)=x^2+1/x^2 then f'(x)=

If f(x+1/x)=x^2+1/x^2 then f'(x)=

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))

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

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

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

If f(x)=(x-|x|)/(|x|), then f(-1)=