Question

if A and B are two sets show that n(B-A) = 2n (A-B)= 4n (AnB)

Answer 1

n(B-A) main A nhi par B to B= 2n,or
n(A-B) mains B nhi par A to A= 4n
when n= 1,2,3,4.........
(B-A)= 2,4,....and (A-B)=4,8...... do that answer is