# 1OXให้ • U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} • A = {1, 3, 5, 7} • B = {2, 3, 4, 5} • C = {4, 5, 6, 7} 1. A U B = {1, 2, 3, 4, 5, 7}ใช่หรือไม่
# 2OXให้ • U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} • A = {1, 3, 5, 7} • B = {2, 3, 4, 5} • C = {4, 5, 6, 7} 2. A U C = \{5, 7\} (มี 2 ตัว ไม่ใช่ตัวเดียว)ใช่หรือไม่
# 3OXให้ • U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} • A = {1, 3, 5, 7} • B = {2, 3, 4, 5} • C = {4, 5, 6, 7} 3. B - C = \{2, 3\} ใช่หรือไม่
# 4OXให้ • U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} • A = {1, 3, 5, 7} • B = {2, 3, 4, 5} • C = {4, 5, 6, 7} 4. A’ = \{0, 2, 4, 6, 8, 9\} ใช่หรือไม่