Question

if a={1,2,3,4,5,} and b={2,4,6,8} , then find the cardinal number of a-b and b-a​

Answer 1

Step-by-step explanation:

|a|=5

|b|=4

|a-b|=|{1,2,3,4,5}-{2,4,6,8}|=|{1,3,5}|=3

|b-a|=|{2,4,6,8}-{1,2,3,4,5}|=|{6,8}|=2