ini caranya gimana ya? Yang nomer 27

A. A U (B n C) ^c
= {1,2,3,4} U ({4,5,6} n {3,5,7}) ^c
= {1,2,3,4} U {5,}^c
= {1,2,3,4} U {1,2,3,4,6,7,8}
= {1,2,3,4,6,7,8}
B. (A^c n B^c) n C
= ({1,2,3,4}^c n {4,5,6}^c) n {3,5,7}
= ({5,6,7,8} n {1,2,3,7,8}) n {3,5,7}
= {7,8} n {3,5,7}
= {7}
C. (B - C)^c n A
= ({4,5,6} - {3,5,7}) ^c n {1,2,3,4}
= {4,6}^c n {1,2,3,4}
= {1,2,3,5,7,8} n {1,2,3,4}
= {1,2,3}
Yg C sedikit ragu, tp smoga membantu :)