📄 中英对照组合问题.htm
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<TD bgColor=#6595d6 height=25><IMG height=11
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style="COLOR: white"> 主题:中英对照:组合问题</STRONG></TD></TR>
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<TD width=64>作 者</TD>
<TD width=233>ok101</TD>
<TD width=63>阅读次数</TD>
<TD width=85>52</TD>
<TD width=63>回复次数</TD>
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<TD width=64>所属栏目</TD>
<TD width=233>基础应用与新手入门>> IT英语</TD>
<TD width=63>发表日期</TD>
<TD width=85>2006-9-6</TD>
<TD width=63>回复日期</TD>
<TD
width=85>2006-9-6</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
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<DIV class=userInfoBox>积分:2768<BR>第二级</DIV>
<DIV class=userInfoBox>注册时间<BR>2003-5-12</DIV></DIV></TD>
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<DIV class=TitleInfoBox align=right>发表时间:2006-9-6 11:15:25 楼主</DIV>
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<DIV id=cont_right style="WIDTH: 495px">The members of a finite set can be
counted in many ways.If the set is small,we can simply list the members
and number the list with positive integers,starting with 1 and proceeding
in the natural order until we reach the end of the list [1].But for a
large set,that method is slow and error-prone [2].Consequently,more
sophisticated strategies and techniques have been developed for counting
large or intricately defined sets.Successful counting depends largely on
one’ s skill and insight in selecting an appropriate method for the
problem at hand.Such skill can best be developed by becoming thoroughly
familiar with various methods of counting and by acquiring experience in
applying these counting methods to a wide range of specific
problems.<BR><BR>First we emphasize the importance of generalization and
experimentation.For example,to determine the number of 11-member
committees that can be formed from the 100 members of the United States
Senate,we should recognize that this question is a special instance of
following more general question:<BR><BR>How many different subsets of size
k can be selected from the members of a set having n distinct
members?<BR><BR>We might solve this problem by using some small values of
k and n with k<= n.Often the reasoning [3] used in solving the smaller
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