A function f : A □ B defined as follows then f−1 B□A is function or not
find the domain and range of the real function f defined by f(x)=√x−1
Or
Let f= {(1,1), (2,3),(0,-1),(-1,-3)} be a function from Z to Z defined by f(x) = ax+b from some integers a and b. Determine a and b.