Question

Given, A={1,2,3,4,5} B={3,4,5,6} & C={5,6,7,8}, show that AU(BUC)=(AUB)UC

Answer 1

(123456) = (123456) is the answer

Answer 2

BUC=3, 4, 7, 8
AUB=1, 2, 6


now...
AU(BUC)=1, 2, 5, 7, 8


now..
(AUB)UC=1, 2, 5, 7, 8