Prove that for all fixed such that k isn't 0 the map defined by is an automorphism of .
So I need to show it is an isomorphism. I am having a problem with the homomorphism part though.
Let . but .
What do I need to do?
in dwsmith's defense, it is bad form to speak of "the group Q". a group is not merely a set, but a set and a binary operation. failure to specify the intended binary operation requires an unwarranted amount of mysticism on the student's part.