0 votes 0 votes Show that the polynomial f: Z+X Z+ $\rightarrow$ Z+ with f(m,n) = (m+n-2)(m+n-1)/2 + m is one to one and onto . Set Theory & Algebra kenneth-rosen discrete-mathematics set-theory&algebra descriptive functions + – khushtak asked Jun 6, 2016 edited Mar 10, 2019 by Pooja Khatri khushtak 254 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.