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

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

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

If f(x+3)=x^(2)-1, then f(x) is equal to

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

* If f(x)=|x-2|+|x+1|-x then f'(-10) is equal to:

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

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

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

For a suitabily chosen real constanat a let a fuction , f: R ~[~a] to R be defined by f(x) = (a-x)/(a+x) . Further suppose that for any real number x ne - a and f(x) ne = 2 (fof) (x) = x . Then f(-(1)/(2)) is equal to :