=SUMPRODUCT((--RIGHT(A1:A3,LEN(A1:A3)-1)))
分子 =LEFT(A1,FIND("/",A1)-1) 分母 =RIGHT(A1,LEN(A1)-FIND("/",A1
EXCEL中:=SUMPRODUCT(1/(1+A1*ROW(INDIRECT("1:"&A3))))公式成立,如果进行
设a1,a2,a3为正数,求证a1*a2/a3+a2*a3/a1+a3*a1/a2>=a1+a2+a3
三个正整数a1,a2,a3,且a1+a2+a3=a1×a2×a3,a1≥1,a2≥2,a3≥3,求a1,a2,)
=LEFT(A1,LENB(A1)-LEN(A1)) =RIGHT(A1,LEN(A1)*2-LENB(A1)) 是用来
a1+a3+a14=27
=SUMPRODUCT(--LEFT(A1:B1,FIND("+",A1:B1)-1))&"+"&SUMPRODUCT(
=SIN(PI()*(LEFT(A1,LEN(A1)-4)+MID(A1,LEN(A1)-3,2)/60+RIGHT(A
正数a1,a2,a3两两不等,且a2-a1=a3-a2,求证1\(√a2+√a1)+1\(√a2+√a3)=2\(√a1
已知一列数a1,a2,a3,a4,a5,a6,a7,且a1=1,a7=729,a1/a2=a2/a3=a3/a4=a4/
向量组(1)a1,a2,a3(2)a1,a2,a3,a4(3)a1,a2,a3,a5 R(1)=R(2)=3,R(3)=
已知整数a1,a2,a3,a4,...满足下列条件:a1=2,a2=-|a1+1|.a3=-|a2+2|,a4=-|a3