有三數a1 b1 c1
=IF(a1=a2,a1+1,a1)
可是我希望是
=IF(a1=a2或a1=a3,a1+1,a1)
能不能一次解決而不要分兩次寫
=IF(a1=a2,a1+1,a1)
=IF(a1=a3,a1+1,a1)
請前輩幫幫忙
thx