Tolong nomor 17 & 18 dong besok kimpul
17. C = {x | x < 7} atau = {x | x < 7, x ∈ bilangan cacah}
18. M = {2, 3, 5, 7, 11, 13}
N = {1, 2, 3, 4, 5, 6}
M∪N = {1, 2, 3, 4, 5, 6, 7, 11, 13}
M∩N = {2, 3, 5}
M-N = {7, 11, 13}
(M∩N)' = {1, 4, 6, 7, 11, 13}