; it is thus
the union of their differences in opposite orders.
Show that
.
The symmetric difference of two sets A and B, denoted by A Δ B, is defined by A Δ B = ( A - B ) U ( B - A ); it is thus the union of their differences in opposite orders. Show that A Δ ( B Δ C ) = ( A Δ B ) Δ C.
The symmetric difference of two sets is investigated. The solution is detailed and well presented.