m^2+m-6/m^2+2m+1÷m+3/m^+m·m^2-1/2-m 其中m=-1/2

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m^2+m-6/m^2+2m+1÷m+3/m^+m·m^2-1/2-m 其中m=-1/2
m^2+m-6/m^2+2m+1÷m+3/m^+m·m^2-1/2-m 其中m=-1/2

m^2+m-6/m^2+2m+1÷m+3/m^+m·m^2-1/2-m 其中m=-1/2
原式=[(m²+m-6)/(m²+2m+1)]÷[(m+3)/(m²+m)]×[(m²-1)/(2-m)]
=[(m+3)(m-2)/(m+1)²]×[(m²+m)/(m+3)]×[-(m+1)(m-1)/(m-2)]
=[(m-2)/(m+1)²]×m(m+1)×[-(m+1)(m-1)/(m-2)]
=-m(m-1)
=-m²+m
当m=-1/2时
原式=-(-1/2)²-1/2
=-1/4-1/2
=-3/4

m^2+m-6/m^2+2m+1÷m+3/m^+m·m^2-1/2-m 其中m=-1/2 计算：（m+3m+5m+...+2009m)-(2m+4m+6m+...+2008m) (m+3m+5m+...+2009m)-(2m+4m+6m+...2008m) (m+3m+5m+...+2014m)-(2m+4m+6m+...+2013m) (m+3m+5m+...+2013m)-(2m+4m+6m+...+2012m) (m+3m+5m+...+2015m)-(2m+4m+6m+...+2014m)= 计算:(m+3m+5m+...+2009m)-(2m+4m+6m+...+2010m) m-2m-3m+4m-5m-6m+7m.2004m=? (m+3m+5m.+2013m)-(2m+4m+6m+.+2012m)=? m-2m-3m+4m-5m-6m+7m-8m-9m+...+2002m-2003m-2004m求m的值 已知m＞4,化简|m-4|+|7-2m|+|m×m-2m+1|-|m×m-2m-3| 计算(m+3m+5m+7m+.+2009m)-(2m+4m+6m+.+2008m) 计算(m+3m+5m+7m+.+2013m)-(2m+4m+6m+.+2012m) (m+3m+5m+7m+.+2009m)-(2m-4m-6m-.-2008m)=? (m+3m+5m+7m+.+2011m)-(2m+4m+6m+.+2010m) 要说理由! 计算：m-2m-3m+4m-5m-6m+7m-8m-9m+...+2002m-2003m-2004m m-2m-3m+4m-5m-6m+7m-8m-9m+.+2002m-2003m-2004m (m-3)/(m平方-1)÷(m平方-3m)/(m平方+2m+1)-1/m-1