│1/2-1│+│1/3-1/2│+│1/4-1/3│+│1/5-1/4│+……+│1/2011-2010│+│1/20

007band2022-10-04 11:39:541条回答

│1/2-1│+│1/3-1/2│+│1/4-1/3│+│1/5-1/4│+……+│1/2011-2010│+│1/2012-1/2011│
求答案啊各位大神QAQ明天就回校了求答案QAQ今晚坐等啊QAQ

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稻草一根根共回答了21个问题 | 采纳率90.5%: │1/2-1│+│1/3-1/2│+│1/4-1/3│+│1/5-1/4│+……+│1/2011-2010│+│1/2012-1/2011│
=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+...+1/2010-1/2011+1/2011-1/2012
=1-1/2012
=2011/2012; 1年前