:|1/2012-1/2011|+|1/2011-1/2010|+|1/2010-1/2009||+…+|1/3-1/2|+|1/2-1|
=1-1/2+1/2-1/3+……+1/2011-1/2012
=1-1/2012
=2011/2012
计算:|1/2012-1/2011|+|1/2011-1/2010|+|1/2010-1/2009||+…+|1/3-1/2|+|1/2-1|
计算:|1/2012-1/2011|+|1/2011-1/2010|+|1/2010-1/2009||+…+|1/3-1/2|+|1/2-1|
数学人气:379 ℃时间:2019-08-18 10:10:36
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