0 votes 0 votes Show that if $A \subseteq C$ and $B \subseteq D$, then $A \times B \subseteq C \times D$ Set Theory & Algebra kenneth-rosen discrete-mathematics set-theory&algebra + – Pooja Khatri asked Apr 5, 2019 Pooja Khatri 157 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.