=IF(X5="","",VLOOKUP(B5,'Basic Information'!R$3:S$43,2,0)*X5
=IF(ISERROR(VLOOKUP($B5,基本信息,2,FALSE)),"",VLOOKUP($B5,基本信息,2
=IF($B5="m",VLOOKUP($C5,make,8,FALSE),IF($B5="a",VLOOKUP($C5
X1 - X3 - X4 -5X5=0 X1+2X2+3X3+3X4+7X5=0 X1+X2+X3+X4+X5=0 X2
简单线代题///X1+X2+X3+X4+X5=13X1+2X2+X3+X4+3X5=0 X2+2X3+2X4+6X5=3
sn=(2-3x5^-1)+(4-3x5^-2)+…+(2n-3x5^-n)要详解答案,急用!
1x5+2x5+3x5+4x5+5x5… 麻烦给我一个公式.
=VLOOKUP(B5,gz,2,FALSE)
S=(1/1x3)+(1/3x5)+省略号+1/(2n-1)(2n+1)
=IF(ISNA(VLOOKUP(R$2&$A7,随时更新!$A:$B,2,0)),0,VLOOKUP(R$2&$A7,
解方程组X2+X3+X4=1 X1+X2+X3=5 X3+X4+X5=-5 X4+X5+X1=-3 X5+X1+X2=2
求齐次线性方程组的基础解系和通解 X1+X2-X3+2X4+X5=0 X3+3X4-X5=0 2X3+X4-2X5=0
3x-4X5=16