应该是1/3*5+1/5*7+1/7*9…+1/2009*2011.
1/3*5+1/5*7+1/7*9…+1/2010*2011
=1/2*(1/3-1/5+1/5-1/7…+1/2009-1/2011)
=1/2(1/3-1/2011)
=1004/6033
1/3*5+1/5*7+1/7*9…+1/2010*2011
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相关问题
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数学题1/1*3+1/3*5+1/5*7+1/7*9+.1/2011*2013 =
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1/3×5+1/5×7+1/7×9.+1/2011×2013
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1+3+5+7+9.+2009+2011=?
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-1+3+(-5)+7+(-9)+……+2009+(-2011)=多少
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(1+1/3+1/5+1/7)*(1/3+1/5+1/7+1/9)-(1+1/3+1/5+1/7+1/9)*(1/3+1