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