Jawabanmu

2014-09-11T22:36:19+07:00
H - K = {2,5}
(H - K) Ω L = {5}

maaf kalo salah..smoga bermanfaat :)
6 3 6
2014-09-11T22:38:04+07:00
(H-K) n L
({2,4,5}-{1,4,7}) n {7,5,1}
{1,2,5,7} n {7,5,1}
={1,5,7}
5 5 5