1/1*3+1/3*5+1/5*7+…+1/97*99找规律计算
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1/1*3+1/3*5+1/5*7……+1/17*19
简算:1/(1*3)+1/(3*5)+1/(5*7)+……+1/(99*101)=
1/1*3+1/3*5+1/5*7……1/97*99=
1×3/1+3×5/1+5×7/1……+49×51/1
1/1×3 1/3×5 1/5×7 …… 1/2009×2010等于多少
1/1*3+1/3*5+1/5*7+……+1/2003*2005结果是什么?
1/1×3+1/3×5+1/5×7+……+1/47×49简便计算
1/1*3+1/3*5+1/5*7+……+1/47*49
1+1/1*3+1/3*5+1/5*7+1/7*9+……+1/99*101=?
1/3+3/5+5/7+……+2007/2009
1/3×1/5+1/5×1/7+1/7×1/9+……+1/97×1/99
1×1/3+1/3×1/5+1/5×1/7+……+1/99×1/101
1/3*5+1/5*7+1/7*9+……1/97*99
(+1)+(-3)+(+5)+(-7)+…+(2005)+(-2007)
1+3+5+7+… +49=
1+3+5+7+9+……+(2n-1)
计算1/1×3+1/3×5+1/5×7+…+1/1997×1999
计算:1/1*3+1/3*5+1/5*7+…+1/99*101.怎么来?