m+2m^2+3m^3+4m^4+...nm^n=?能不能给个过程
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m+2m^2+3m^3+4m^4+...nm^n=?能不能给个过程m+2m^2+3m^3+4m^4+...nm^n=?能不能给个过程m+2m^2+3m^3+4m^4+...nm^n=?能不能给个过程若
m+2m^2+3m^3+4m^4+...nm^n=?能不能给个过程
m+2m^2+3m^3+4m^4+...nm^n=?
能不能给个过程
m+2m^2+3m^3+4m^4+...nm^n=?能不能给个过程
若m=1
m+2m^2+3m^3+4m^4+...nm^n=1+2+3+4+…+n=n(n+1)/2
若m≠1
记m+2m^2+3m^3+4m^4+...nm^n=S
mS=m^2+2m^3+3m^4+…+(n-1)m^n+nm^(n+1)
上下两式相减,（m-1）S=nm^(n+1)-(m^n+…+m^4+m^3+m^2+m)
=(n-1/(m-1))m^(n+1)+m/(m-1)
S=(n/(m-1)-1/(m-1)^2)m^(n+1)+m/(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
(m+3m+5m+...+2009m)-(2m+4m+...+2008m)怎么算
合并同类项m-2m+3m-4m+5m-.+2011m-2012m
m+3m+5m+...+2011m-2m-4m-...-2010m等于多少?
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