│1/2-1│+│1/3-1/2│+│1/4-1/3│+│1/5-1/4│+……+│1/2011-2010│+│1/2012-1/2011│
问题描述:
│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
答
│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...智力太低表示不明白=-=1/2-1的绝对值是1/2,但是后面的数要怎么和1/2扯上关系- -│1/2-1│=1-1/2 呀对哦....那│1/3-1/2│呢...就等于1/2-1/3么?然后以此类推?是的