0 votes 0 votes Show that if $A$ and $B$ are sets with $A \subseteq B,$ then $A \cup B = B$ $A \cap B = A$ Set Theory & Algebra kenneth-rosen discrete-mathematics set-theory&algebra + – Pooja Khatri asked Apr 6, 2019 Pooja Khatri 153 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.