=2008/2009*2007/2008*2006/2007*……*2/3*1/2（分子分母都约掉了）
=1/2009
(1/2009-1)*(1/2008-1)*(1/2007-1)*.*(1/3-1)*(1/2-1)等于多少
3个回答
相关问题
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|1/2009-1/2008|-|1/2008-1/2007| =1/2008-1/2009-1/2007+1/2008
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1/(√2009+√2008)+1/(√2008+√2007)+.+1/(√3+√2)+1/(√2+1)
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|1/2009-1/2008|+|1/2008-1/2007|+……+|1/3-1/2|+|1/2-1|=?
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(1+1/2007+1/2008)*(1/2007+1/2008+1/2009)-(1+1/2007+1/2008+1/
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1/1*2+1/2*3+1/3*4+...+1/2007*2008+1/2008*2009
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-(1／2009－1/2008)＋[-(1/2008-1/2007)]＋┈＋[-(1/2－1)]
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化简：|1/2010-1/2009|+|1/2009-1/2008|+|1/2008-1/2007|-|1/2007-1
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2007X2009X(1/2007X2008+1/2008X2009)等于多少啊,
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(1-1/2009)(1-1/2008)(1-1/2007)……（1-1/3）（1-1/2）
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(1/2009-1)*(1/2008-1)*(1/2007-1)*……*(1/3-1)*(1/2-1)