1/1×1/3×5+1/5×7+……+1/49×51要过程上面的第一个打错了是1/1×3
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![1/1×1/3×5+1/5×7+……+1/49×51要过程上面的第一个打错了是1/1×3](/uploads/image/z/3905507-11-7.jpg?t=1%EF%BC%8F1%C3%971%EF%BC%8F3%C3%975%2B1%EF%BC%8F5%C3%977%2B%E2%80%A6%E2%80%A6%2B1%EF%BC%8F49%C3%9751%E8%A6%81%E8%BF%87%E7%A8%8B%E4%B8%8A%E9%9D%A2%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E6%89%93%E9%94%99%E4%BA%86%E6%98%AF1%EF%BC%8F1%C3%973)
1/1×1/3×5+1/5×7+……+1/49×51要过程上面的第一个打错了是1/1×3
1/1×1/3×5+1/5×7+……+1/49×51要过程
上面的第一个打错了是1/1×3
1/1×1/3×5+1/5×7+……+1/49×51要过程上面的第一个打错了是1/1×3
1/1×3+1/3×5+1/5×7+……+1/49×51
=1-1/3+1/3-1/5+1/5-1/7+……+1/49-1/51
=1-1/51
=50/51
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
1/3×1/5+1/5×1/7+1/7×1/9+……+1/97×1/99
1+3+5+7+9+……+(2n-1)
1/3*5+1/5*7+1/7*9+……1/97*99
1+1/1*3+1/3*5+1/5*7+1/7*9+……+1/99*101=?
1×1/3+1/3×1/5+1/5×1/7+……+1/99×1/101
1/3+3/5+5/7+……+2007/2009
1*3/1+3*5/1+5*7/1+……+(2n-1)(2n+1)/1=?
计算:1/1*3+1/3*5+1/5*7+1/7*9+……+1/97*99=
1/1×3+1/3×5+1/5×7+1/7×9……1/97×99算式,
1/1*3+1/3*5+1/5*7+1/7*9……+1/99*101等于多少?