【单选题】
设 A = {1, 22, 43, 3},B = {1, 32, 44, 2},则差关系A-B等于:
【单选题】
设 A = {1, 22, 43, 3},B = {1, 32, 44, 2},则交关系A∩B等于:
【单选题】
设 A = {1, 22, 43, 3},B = {1, 32, 44, 2},则并关系A∪B等于:
【单选题】
设 A = {1, 22, 43, 3},B = {1, 32, 44, 2},则差关系A-B的域fld(A-B)等于:
【单选题】
设 A = {1, 22, 43, 3},B = {1, 32, 44, 2},则交关系A∩B的值域ran(A∩B)等于:
【单选题】
设 A = {1, 22, 43, 3},B = {1, 32, 44, 2},则并关系A∪B的定义域dom(A∪B)等于:
【简答题】
设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则对称差关系A⊕B等于:[填空1]
【简答题】
设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则交关系A∩B等于:[填空1]
【简答题】
设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则交关系A∩B的值域ran(A∩B)等于:[填空1]
【判断题】
{2,22,32,43,33,44,4}是集合 A={2, 3, 4}上的小于等于关系。