(1/2012-1)(1/2011-1)(1/2010-1)...(1/3-1)(1/2-1)咋做
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/21 20:10:30
![(1/2012-1)(1/2011-1)(1/2010-1)...(1/3-1)(1/2-1)咋做](/uploads/image/z/2559610-10-0.jpg?t=%281%2F2012-1%29%281%2F2011-1%29%281%2F2010-1%29...%281%2F3-1%29%281%2F2-1%29%E5%92%8B%E5%81%9A)
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(1/2012-1)(1/2011-1)(1/2010-1)...(1/3-1)(1/2-1)咋做
(1/2012-1)(1/2011-1)(1/2010-1)...(1/3-1)(1/2-1)咋做
(1/2012-1)(1/2011-1)(1/2010-1)...(1/3-1)(1/2-1)咋做
=(-2011/2012)(-2010/2011)...(-1/2)
=(-1)^2011(1/2012) (注:分子分母逐项相约)
=-1/2012
额
=-1/2012
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