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若集合A={0,1,2},B={-1,1},则从A到B可以建立不同映射的个数为   .

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方法的集合  具有继承关系的若干类集合  若干类的集合  相互通信的对象集合  
=B3*15%+C3*25%+D3*60%  =B$3*15%+C$3*25%+D$3*60%  =SUM(B3*15%+C3*25%+D3*60%)  =SUM(B$3*15%+C$3*25%+D$3*60%)  
={-1,3,5},若f:x→2x-1是集合A.到集合  的映射,则集合B.可以是(  ) A.{0,2,3}B.{1,2,3}  {-3,5}  {-3,5,9}  
=B3*15%+C3*25%+D3*60%  =B$3*15%+C$3*25%+D$3*60%  =SUM(B3*15%+C3*25%+D3*60%)  =SUM(B$3*15%+C$3*25%+D$3*60%)  
=COUNT(E3:E10,>=60)和=COUNT(E3:E10,<60)  =COUNT(E3:E10,">=60")和=COUNT(E3:E10,"<60")  =COUNTIF(E3:E10,>=60)和=COUNTIF(E3:E10,<60)  =COUNTIF(E3:E10,">=60")和=COUNTIF(E3:E10,"<60")  
{1,2,3}  {0,2,3}  {﹣3,5,9}  {﹣3,5}  
=B3*15%+C3*25%+D3*60%  =B$3*15%+C$3*25%+D$3*60%  =SUM(B3*15%+C3*25%+D3*60%)  =SUM(B$3*15%+C$3*25%+D$3*60%)  
sum(B11:c$15)  sum(B11:c15)  sum(c$11:c$25)  sum(B$11:c$15)  
={-1,3,5},若f:x→2x-1是集合A.到集合  的映射,则集合B.可以是 (   ) A.{-3,5,9 , 10}B.{1,2,3}  {-3,5}  {0,2,3}  
=B3*15%+C3*25%+D3*60%  =B$3*15%+C$3*25%+D$3*60%  =SUM(B3*15%+C3*25%+D3*60%)  =SUM(B$3*15%+C$3*25%+D$3*60%)  
{0,2,3}  {1,2,3}  {﹣3,5}  {﹣3,5,9}  
=B3*15%+C3*25%+D3*60%  =B$3*15%+C$3*25%+D$3*60%  =SUM(B3*15%+C3*25%+D3*60%)  =SUM(B$3*15%+C$3*25%+D$3*60%)  
=COUNT(E3:E10,>=60)和=COUNT(E3:E10,<60)  =COUNT(E3:E10,">=60")和=COUNT(E3:E10,"<60")  =COUNTIF(E3:E10,>=60)和=COUNTIF(E3:E10,<60)  =COUNTIF(E3:E10,">=60")和=COUNTIF(E3:E10,"<60")  
=COUNT(E3:E10,>=60)和=COUNT(E3:E10,<60)  =COUNT(E3:E10,">=60")和=COUNT(E3:E10,"<60")  =COUNTIF(E3:E10,>=60)和=COUNTIF(E3:E10,<60)  =COUNTIF(E3:E10,">=60")和=COUNTIF(E3:E10,"<60")  
{﹣4,8,14}  {﹣4,8,﹣14}  {4,8,14}  {4,﹣8,14}  

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