okay, so i need to determine whether or not f is one-to-one and onto. if so, find f^-1.

im pretty sure i can do it, i just dont know how to read the thing.

A=R \ {0} and B=R \ {2} and f: A->B

f(x)= 1/x + 2

where R is the reals. can anyone please explain to me how to read that?