Question

If A and B are disjoint sets, then (A-B) +n(B-A) is

Answer 1

Answer:

Here is your answer

Step-by-step explanation:

The number of elements in the union (A∪B) is simply the sum of the number of elements in A and the number of elements in B: |A ∪ B| = |A| + |B|. [ |A|→no of elements in A and other notations mean similar].

But if A and B overlap, then the latter formula does not hold because, we are counting the elements in the intersection (A ∩ B) twice. Compensating for that leads to the given formula: |A ∪ B| = |A| + |B| − |A ∩ B|.

[ Note : n(A U B) is also denoted as |A U B| ]

Elements in (AUB)=elements in (A)+ elements in (B).

In above example, union of disjoint sets is;

Element set in A + Element set in B

={1,2,3,5,7,9}

Answer 2

Answer:

Zero

Step-by-step explanation:

If A and B are disjoint set it mean that the elements in set A are different from the elements of set B