Quote Originally Posted by xmathlover View Post
oh so then, g^1(-6) = -10
Is the domain of g express liked this {x | x +- 5} or should it be expressed different? My notes suck...they don't explain anything about domain and codomain in orderpair notation
Read reply #2. I answered that question.

There is no general agreement on the meaning of codomain.

I know of a whole school of analysis which will not allow the use those words.
Instead, they use initial set and finial set.
Others use different terms such as domain and range.