Question

Tolong nomer 1 pertanyaan ini khusus kak syubbana

Answer 1

A = {1,2,3,4,5,6,7}
B = {5,6,7,8,9}
C = {7,8,9,10,11,12}

a) A u B = B u A
    {1,2,3,4,5,6,7,8,9} = {1,2,3,4,5,6,7,8,9}

b) A u (B n C) = (A u B) n (A u C)
    {1,2,3,4,5,6,7} u (7,8,9) = {1,2,3,4,5,6,7,8,9} n {1,2,3,4,5,6,7,8,9,10,11,12}
     {1,2,3,4,5,6,7,8,9} = {1,2,3,4,5,6,7,8,9}

c) (A u B)^c = A^c n B^c
    { 10,11,12,13,14,15} = {8,9,10,11,12,13,14,15} n {1,2,3,4,10,11,12,13,14,15}
     { 10,11,12,13,14,15} = {10,11,12,13,14,15}