# Simple proof involving groups

by JohnDuck
Tags: groups, involving, proof, simple
 Sci Advisor HW Helper P: 2,537 Simple proof involving groups Here's a start on one of them: Let's say we have some $i$ (not necessarily $e$) with $$i \times x = x$$ then $$i \times i = i$$ $$i^{-1} \times (i \times i) =i^{-1} \times i$$ . . .