Question

For any two sets A and B . Prove that (A-B) union B = A union B​

Answer 1

Answer:

let

a=4 5 6

and b=4 2 6

now (a-b)UB=(aUb)

first(a-b)=(2)

now b=(aUb)=(4 6)

then (a-b)UB=(aUb)=()