=SUM(1/COUNTIF($A$11:$A$1346,$A$11:$A$1346))
数组公式,按CTRL+SHIFT+ENTER三键结束
=SUMPRODUCT(1/(COUNTIF($A$1:$A$100,$A$1:$A$100)))
补充回答
公式的引用区域根据实际情况变动
=SUMPRODUCT(1/(COUNTIF($A$11:$A$1346,$A$11:$A$1346)))
输入:=SUM(1/COUNTIF(A:A,A:A)) ,按CTRL+SHIFT+ENTER,回车。OK,
=sum(1/countif(a1:a10,a1:a10))
数组公式,按CTRL+SHIFT+ENTER三键结束
不行呀,显0