计算(1/2012-1)*(1/2011-1)*(1/2010-1)*(1/2009-1)*(1/2008-1)*.(1
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计算(1/2012-1)*(1/2011-1)*(1/2010-1)*(1/2009-1)*(1/2008-1)*.(1/2001-1)*(1/2000-1)
![计算(1/2012-1)*(1/2011-1)*(1/2010-1)*(1/2009-1)*(1/2008-1)*.(1](/uploads/image/z/8402039-71-9.jpg?t=%E8%AE%A1%E7%AE%97%281%2F2012-1%29%2A%281%2F2011-1%29%2A%281%2F2010-1%29%2A%281%2F2009-1%29%2A%281%2F2008-1%29%2A.%281)
(1/2012-1)*(1/2011-1)*(1/2010-1)*(1/2009-1)*(1/2008-1)*.(1/2001-1)*(1/2000-1)
=(-2011/2012)(-2010/2011)*(-2009/2010)...(-2000/2001)(-1999/2000)
=1999/2012
=(-2011/2012)(-2010/2011)*(-2009/2010)...(-2000/2001)(-1999/2000)
=1999/2012