If a2-a=1 and az+a-3 are opposite numbers to each other,and themverse number of a is less than the接着是opposite number of a,then a的2009次方+a的2010次方= (英汉词典:inverse number倒数；opposite相反的)确认是0

excel匹配函数 =IF(ISNA(VLOOKUP(A2,Sheet1!A$1:AZ$9999,19,FALSE)),0,VLOOKUP(A2,Sheet1!A$1:AZ$9999,19,这个公式中前面的A2 sheet1跟后面的A2 sheet2 If a2-a=1 and az+a-3 are opposite numbers to each other,and themverse number of a is less than the接着是opposite number of a,then a的2009次方+a的2010次方= (英汉词典:inverse number倒数；opposite相反的)确认是0 =IF(COUNTIF($A$1:A2,A2)>0,COUNTIF($A$1:A2,A2)) =IF(COUNTIF($A$1:A2,A2)>0,COUNTIF($A$1:A2,A2)) 矩阵|a1+b1 a1+b2.a1+bn;a2+b1 a2+b2.a2+bn;.an+b1 an+b2.an+bn|等于多少,规律是什么|ax+by ay+bz az+bx;ay+bz az+bx ax+by;az+bx ax+by ay+bz|=(a^3+b^3)|x y z;y z x;z x y|怎么证明；求解题步骤， =IF(A2>90,A ,IF(A2>80,B ,C )) “=IF(A2>90,A,IF(A2>80,B,C))”, =IF(COUNTIF(A:A,A2)>1,重复,).的例子 请问这两个删除重复的公式有什么不同?假设数据在A2-A11(A1为空）,我在B2编辑公式：=if（AND(countif(A:A,A2)>1,COUNTIF(A$1:A10,A2)>0),,A2) 或 =IF(COUNTIF(A$!:A10,A2),,A2) 这两个公式前一个是我看到别人的简 计算由球面x2+y2+z2=3a2和抛物面x2+y2=2az所围立体的全表面积 （a>0） excel 函数翻译B2=IF(COUNTIF($A$2:$A$100,A2)>1,A2,) 1.Does formula f(x)=1/(x²-2) define a function f:R->R?A function Z->R?2.If there are 2187 function f:A->B and |B|=3.What is |A|?3.Give an example of a function f:A->B and A1,A2 in the A for which f(A1∩A2) ≠ f(A1)∩f(A2)4.If A={1,2,3,4,5} an =IF(ISERROR(VLOOKUP(A2,A$1:A1,1,0)),, 请解释下这句EXCLE公式 =IF(A2=,,VLOOKUP(A2,Sheet2!$A$1:$C$3,2,FALSE)) x/(ax-a^2)+y/(ay-a^2)+z/(az-a^2)=1/(x-a)+1/(y-a)+1/(z-a)+3/a 请解释IF(COUNTIF(A2:$A$100,A2)=1的意思 =IF(ISERROR(IF(A2,SUM(OFFSET($E$1,MATCH(COUNTA($A$2:A2)&组,$A$2:$A$14,),MATCH((COUNTA($A$2:A2)+1)&组,$A$2:$A$14,)-MATCH(COUNTA($A$2:A2)&组,$A$2:$A$14,))),)),SUM($E$2:$E$14)-SUM($F1:F$2),IF(A2,SUM(OFFSET($E$1,MATCH(COUNTA($A$2:A2)&组 ( a2-9)/(a2+6a+9) ÷(a-3) /(a2+3a) - (a-a2) /(a2-1),