=SUMPRODUCT(($A$1:$A$5=$A5)*($B$1:$B$5>$B5)*1)+1 这里为什么要*1
若1/a + 1/b + 1/c = 1/a+b+c,证明:1/a5 +1/b5 + 1/c5 = 1/a5+b5+c5
设a,b,c是方程χ3-χ+1=0的三个根,则a5+b5+c5=
已知a+b+c=0,求证1/2(a2+b2+c2).1/3(a3+b3+c3)=1/5(a5+b5+c5)
初三 数学 a2=a+1,b2=b+1,a不等于b,求a5+b5 请详细解答,谢谢! (28 16:14:2)
因式分解(a+b+c)5-a5-b5-c5.急用!
excel中 “=SUMPRODUCT(B3:B5,1+G4:G6)-SUMPRODUCT(C3:C5,1+H4:H6)
横栏A,B竖栏1,2,3,4,5,6,7等等想算出A1/B1+A2/B2+A3/B3+A4/B4+A5/B5+A6/B6
IF(h5="a",b5*1),IF(h5="b",b5*0.5),IF(h5="c",b5*0),3个条件中当H5满足
=SUMPRODUCT(($A$1:$A$6
SUMPRODUCT($A$1:$A$100=A5)*(1/COUNTIF($C$1:$C$100,C$1:$C$100
已知乘法公式:a5+b5=(a+b)(a4-a3b+a2b2-ab3+b4);a5-b5=(a-b)(a4+a3b+a2
观察下列各式:a+b=1,a2+b2=3,a3+b3=4,a4+b4=7,a5+b5=11,…,则a10+b10=___