Question

could somebody please explain to me the rules regarding set theory especially complement

Answer 1

\[A'\] or
\[A^c\]is everything in the "universal set' that is NOT in A

Answer 2

so for example if the universal set is {1,2,3,4,5,6,7,8,9} and if
\[A=\{1,2,3,5\}\] then
\[A'=\{4,6,7,8,9\}\]

Answer 3

i get that

Answer 4

what about
M={1,2,4,6,8}
N={6,7,8,9} and you are asked to find M U N'??