m-2m-3m+4m-5m-6m+7m.2004m=?

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/10 07:35:32

m-2m-3m+4m-5m-6m+7m.2004m
=(1-2-3+4-5-6+7-8-9+...2002-2003-2004)m
=(-4-7-10-..-2005)m
=-(4+7+10+..+2005)m
=-(4+2005)*668/2m
=-671006m

m-2m-3m+4m-5m-6m+7m.2004m=? (m+3m+5m.+2013m)-(2m+4m+6m+.+2012m)=? (m+3m+5m+...+2015m)-(2m+4m+6m+...+2014m)= (m+3m+5m+7m+.+2009m)-(2m-4m-6m-.-2008m)=? m-2m-3m+4m-5m-6m+7m-8m-9m+.+2002m-2003m-2004m (m+3m+5m+.+2008m)-(2m+4m+6m+.+2009m) (m+3m+5m+...+2009m)-(2m+4m+6m+...2008m) 计算:(m+3m+5m+...+2009m)-(2m+4m+6m+...+2010m) (m+3m+5m+...+2013m)-(2m+4m+6m+...+2012m) (m+3m+5m+...+2014m)-(2m+4m+6m+...+2013m) (m+3m+5m+7m+.+2011m)-(2m+4m+6m+.+2010m) 要说理由! 计算：（m+3m+5m+…+2015m）-(2m+4m+6m+…+2014m)=