2/1乘以2=2/1+2 ,3 /2乘以3=3/2+3,4/3乘以4=4/3+4,5/4乘以5=5/4+5,……想什么样
=3乘以2乘以1,=4乘以3乘以2乘以1,=5乘以4乘以3乘以2乘以1,那么100!除以99!
一乘以二乘以三分之一加2乘以3乘以4分之一+3乘以4乘以5分之1+……+48乘以49乘以50分之1.
1乘以2乘以3乘以4乘以5乘以.100积有几个零
1乘以2+2乘以3+3乘以4+4乘以5……+97乘以98+98乘以99+99乘以100等于多少
观察1乘以2乘以3乘以4+1=25=5² 2乘以3乘以4乘以5+1=121=11²
2乘以1+4乘以3+6乘以5直接加到50乘以49
1乘以3分之2乘以4分之3乘以5分之4乘以.乘以20分之19等于多少?
1乘以2乘以3分之1+2乘以3乘以4分之1+3乘以4乘以5分之1+4乘以5乘以6分之1+········+48乘以49乘
根据3^2乘以2^2=(2乘以3)^2 、4^3乘以5^3=(4乘以5)^3的规律 计算:(-8)^1000乘以(-0.
2/1乘以2=2/1+2 ,3 /2乘以3=3/2+3,4/3乘以4=4/3+4,5/4乘以5=5/4+5,……想什么样
1分之【1乘以2】+1/【2乘以3】+1/【3乘以4】+1/【4乘以5】+……+1/【2005乘以2006】等于多少.
27046=2乘以( )+7乘以( )+4乘以( )+6乘以( )