Posted by
**Vonsell** on
.

a)Consider the formula n (A U B) = n (A) + - n (A ¿ B).

(a) Show that this relation holds for A = {1, 2, 3, 4} and B= {2, 4, 5, 6, 7, 8}

(b) Make up your own two sets A and B, each consisting of at least six elements. Using these two sets, show that the relationship above holds