【单选题】
设 A = {1, 22, 43, 3}，B = {1, 32, 44, 2}，则交关系A∩B等于：
①
{1,21,32,43,34,2
②
{2,4
③
{1,21,33,34,2
④
{1,23,3}.
【单选题】
设 A = {1, 22, 43, 3}，B = {1, 32, 44, 2}，则并关系A∪B等于：
①
{1,21,32,43,34,2
②
{2,4
③
{1,21,33,34,2
④
{1,23,3}.
【单选题】
设 A = {1, 22, 43, 3}，B = {1, 32, 44, 2}，则差关系A-B等于：
①
{1,21,32,43,34,2
②
{2,4
③
{1,21,33,34,2
④
{1,23,3}.
【单选题】
设 A = {1, 22, 43, 3}，B = {1, 32, 44, 2}，则对称差关系A⊕B等于：
①
{1,21,32,43,34,2
②
{2,4
③
{1,21,33,34,2
④
{1,23,3}.
【单选题】
极限<img src=https://huaweicloudobs.ahjxjy.cn/94F89BB8EB55DD65350E010DE4BA5780.png title=35WEUW]T10YD1BP)MB0VWPH.png alt=35WEUW]T10YD1BP)MB0VWPH.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/453D679AB5E1EBE4A1C5376808F7F7D7.png title=5MYCBW)[V8207S~YI9]7}9X.png alt=5MYCBW)[V8207S~YI9]7}9X.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/F9ADDAC04F129FD25C697310F02A11B6.png title=%1@X]I)%@VC){J0{V$IH$KQ.png alt=%1@X]I)%@VC){J0{V$IH$KQ.png/>
③
0
④
1