In Exercises 1 and 2 verify the equation nA U B nA nB for t

In Exercises 1 and 2, verify the equation n(A U B) n(A) + n(B) for the given disjoint sets.

Solution

A = { whole number between 0 and 4} = { 1,2,3}

B = { -ve integer greater than -4 }= { -3, -2, -1}

n(AUB) = n(A) +n (B)

set A and set B have no common elements.Hence they are disjoint sets.

So, n(AUB) = n(A) +n(B) = { -3, -2, -1,1,2,3 }