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=SUM(Sheet2! A2:A7) =SUM(Sheet2! A2:Sheet2! A7) =SUM((Sheet2)A2:A7) =SUM((Sheet2)A2:(Sheet2)A7)
V=6/H(A1+ 4A0 +A2) V=4/H(A1+A0 +A2) V=6/H(A 1+A 0 +A2) V=4/H(A 1+ 4A0 +A2)
a2+b2 a2﹣b2 a2+2ab+b2 a2﹣2ab+b2
2(g) + B2(g)达到平衡状态的标志是( ) A.AB的消耗速率等于A.2的消耗速率 容器内三种气体AB.A.2、B.2共存 容器中各组分的体积分数不随时间变化 单位时间内生成n mol A2,同时消耗2n mol AB
=SUM(Sheet2!A2:A7) =SUM(Sheet2!A2:Sheet2!A7) =SUM((Sheet2)A2:A7) =SUM((Sheet2)A2:(Sheet2)A7)
9a2-6ab-b2 b2-6ab-9a2 b2-9a2 9a2-b2
F={A1→A2,A1→A3} F={A1→A2} F={A1→A2} F={A1A3→A2,A1A2→A3}
=SUM(A2:A5) =SUMIF(A2:A5,800,B2:B5) =COUNTIF(A2:A5,800) =SUM(B2:B5,800,A2:A5)
a2+b2 a2-b2 a2+2ab+b2 a2-2ab+b2
(-2)n-1 -(-2)n-1 (-2)n -(-2)n
=AVERAGE(A2:H2) =SUM(A2:H2) =SUM(A2:H2)-MAX(A2:H2)-MIN(A2:H2) =(SUM(A2:H2)-MAX(A2:H2)-MIN(A2:H2))/(COUNT(A2:H2)-2)
SUM(A2:A6) A2+A3+A4+A5+A6 =SUM(A2:A6) =SUM(A2,A6)
如果A1=90、A2=人数、A3=…""、A4=54、A5=36,则公式"=Count(A1:A5)"返回5 如果A1=6.28、A2=3.74,其余单元格为空,则公式"=Counta(A1:A7)"的计算结果等于2 如果A1=90、A2=人数、A3=""、A4=54、A5=36,则公式"=Count(A1:A5)"返回3 如果A1=6.28、A2=3.74,其余单元格为空,则公式"=Counta(A1:A7)"的计算结果等于3