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<p style="line-height: 150%" align="center"><font size="2">本 节 习 题</font> </p>
<p style="line-height: 150%" >1.试明确规定下列集合:<br>
(1)小于五的非负整数集合。<br>
(2)十与二十之间的素数集合。<br>
(3)小于六十五的十二的正倍数集合。</p>
<p style="line-height: 150%" >2.选择适宜的个体域和谓词公式表示下列集合:<br>
(1)零和一百之间的整数集合。<br>
(2)奇整数集合。<br>
(3)十的倍数集合。<br>
(4)永真式的集合。</p>
<p style="line-height: 150%" >3.列举出下列集合的成员:<br>
(1)S={x|x<img src="image/shuyu.gif" width="13" height="11">I
<img src="image/hequ.gif" width="9" height="11">
(3<x<12)},I 为整数集合<br>
(2)S={x|x 是十进制的数字}<br>
(3)S={x|(x=2)<img src="image/xiqu.gif" width="9" height="15">(x=5)}</p>
<p style="line-height: 150%" >4.给定集合 S={2,a,{3},4} 和 R={{a},3,4,1},指出下列命题中哪些的真值为真,哪些的真值为假:<br>
(1){a}<img src="image/shuyu.gif" width="13" height="11">S<br>
(2){a}<img src="image/shuyu.gif" width="13" height="11">R<br>
(3){a,4,{3}}<img src="image/baohan.gif" width="11" height="10">S<br>
(4){{a},1,3,4}<img src="image/shuyu_zhenziji.gif" width="10" height="8">R<br>
(5)R=S<br>
(6){a}<img src="image/baohan.gif" width="11" height="10">S<br>
(7){a}<img src="image/baohan.gif" width="11" height="10">R<br>
(8)<img src="image/kong.GIF" width="11" height="11"><img src="image/shuyu_zhenziji.gif" width="10" height="8">R</p>
<p style="line-height: 150%" >5.下面命题的真值是否为真,说明理由。<br>
(1){a}<img src="image/shuyu.gif" width="13" height="11">{{a}}<br>
(2){a}<img src="image/baohan.gif" width="11" height="10">{{a}}<br>
(3){a}<img src="image/shuyu.gif" width="13" height="11">{{a},a}<br>
(4){a}<img src="image/baohan.gif" width="11" height="10">{{a},a}</p>
<p style="line-height: 150%" >6.列举下列集合的所有子集:<br>
(1){1,{2,3}}<br>
(2){{1,{2,3}}}<br>
(3){<img src="image/kong.GIF" width="11" height="11">,{<img src="image/kong.GIF" width="11" height="11">}}<br>
(4){{1,2}{2,1,1},{2,1,1,2}}</p>
<p style="line-height: 150%" >7.分别用空集 <img src="image/kong.GIF" width="11" height="11">
构成集合 A 和 B,使得 A<img src="image/shuyu.gif" width="13" height="11">B
和 A<img src="image/baohan.gif" width="11" height="10">B。</p>
<p style="line-height: 150%" >8.求出下列集合的幂级:<br>
(1){a,{b}}<br>
(2){1,<img src="image/kong.GIF" width="11" height="11">}<br>
(3){x,y,z}<br>
(4){<img src="image/kong.GIF" width="11" height="11">,a,{a}}</p>
<p style="line-height: 150%" ></p>
<p style="line-height: 150%" >9.设A={a},求 A 的幂集以及 A 的幂集的幂集。 </p>
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