计算:1/1*3+1/2*4+1/3*5+…+1/2011*2013+1/2012*2014

问答/462℃/2025-02-25 00:01:32

优质解答：

原式=1/2(1-1/3+1/3-1/5+...+/2011-1/2013)+1/2(1/2-1/4+1/4-1/6+...+1/2012-1/2014)

=1/2(1-1/2013)+1/2(1/2-1/2014)

=1/2×2012/2013+1/2×1006/2014

=1006/2013+503/2014

=3038623/4054182

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