left(A2,1) if(len(A2)=2,right(A2,1),R(A2,

=RIGHT(A2,LEN(A2)-FIND("-",A2))这个函数是什么意思? =DATEDIF(TEXT(MID(A2,7,INT(LEN(A2)/2-1)),"#-00-00"),“2011-1- =IF(COUNTIF($A$1:A2,A2)>0,COUNTIF($A$1:A2,A2)) =MID(A2,2,FIND("+",A2)-2)*1000+MID(A2,FIND("+",A2)+1,3) LEFT(A2,FIND("*",A2,1)-1中1表示什么 excel 函数翻译B2=IF(COUNTIF($A$2:$A$100,A2)>1,A2,"") =IF(A2="","",VLOOKUP(A2,银行帐号,2,0)) =LEFT(A2,FIND(" ",A2)-1)是什么意思为什么中间要空格?》】、 向量组（1)a1,a2,a3(2)a1,a2,a3,a4(3)a1,a2,a3,a5 R(1)=R(2)=3,R(3)= A1 10-1 A2 A3=IF(A2="","TODAY()-A1+1",A2-A1),today()-A1+1怎么不 求高手详解excel中的=IF(B$1>$A2,"",B$1&"×"&$A2&"="&B$1*$A2)含义 九九乘法表 正数a1,a2,a3两两不等,且a2-a1=a3-a2,求证1\(√a2+√a1)+1\(√a2+√a3)=2\(√a1