Determine whether the following function is injective, surjective or bijective and explain them with reason. x +1 f(x) = when f: R-R x+2 f(m,n) = m - n when f: ZxZ-Z Determine whether the following function is injective, surjective or bijective and explain them with reason. x +1 f(x) = when f: R-R x+2 f(m,n) = m - n when f: ZxZ-Z