Question

prove that a-b=a intersection b'

Answer 1

let U = 1 ,2 ,3 ,4 ,5 ,6 ,7 ,8
A = 1 ,2 ,3 ,4, 5
B = 4 ,5, 6
A-B = 1 ,2, 3
B' = 1 ,2 ,3, 7 ,8
INTERSECTION = 1 ,2 ,3, 7 ,8 INTERSECTS 1, 2, 3 4 5
INTERSECTION = 1
,2 AND 3