1. A = { 0 , 3 , 5 , 6 , 9 } {\displaystyle A=\{0,3,5,{6,9\}}} B = { 2 , 3 , 9 } {\displaystyle B=\{2,3,9\}} C = { 0 , 2 , 3 , 6 } {\displaystyle C=\{0,2,3,6\}} . Знайти
2. A = { 1 , 2 , 3 , 4 , 5 } {\displaystyle A=\{1,2,3,4,5\}} B = { 3 , 4 , 5 , 6 , 7 } {\displaystyle B=\{3,4,5,6,7\}} C = { 2 , 4 , 6 , 8 , 10 } {\displaystyle C=\{2,4,6,8,10\}} . Знайти