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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}