Question

Find AΔB ,if A = {1,3,4 } and B = { 2,5,9,11 }

Answer 1

A ={1,3,4} , B = {2,5,9,11}
A-B = {1,3,4} - {2,5,9,11}
= {1,3,4}
B-A = {2,5,9,11}

A delta B = (A-B) U (B - A)
= {1,3,4} U{2,5,9,11}
={1,2,3,4,5,9,11}