If `f(x)= (1)/(x^2)`, then `f '(x)` is

If f(x)=log((1+x)/(1-x)), then f(x) is (i) Even Function (ii) f(x_(1))-f(x_(2))=f(x_(1)+x_(2)) (iii) ((f(x_(1)))/(f(x_(2))))=f(x_(1)-x_(2)) (iv) Odd function

If f(x-1)=x^(2) , then find f(x+1)

If2f(x)+3f((1)/(x))=x^(2)-1 then f(x) is

If f(x+4) = x^(2) - 1 , then f(x) is equal to

If f(x)=(x+1)^(2)-1 , then f(x)=x give x as

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

If f(x)=sqrt(1-sin2x), then f'(x) equals