3-m 2m-4÷(m+2-5 m-2);
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3-m 2m-4÷(m+2-5 m-2);
3-m/2m-4÷(m+2-5/m-2);
/是分数线,
3-m/2m-4÷(m+2-5/m-2);
/是分数线,
![3-m 2m-4÷(m+2-5 m-2);](/uploads/image/z/17795765-29-5.jpg?t=3%EF%BC%8Dm+2m%EF%BC%8D4%C3%B7%28m%2B2%EF%BC%8D5+m%EF%BC%8D2%29%3B)
(3-m)/(2m-4)÷[m+2-5/(m-2)]
=(3-m)/(2m-4)÷[(m^2-4-5)/(m-2)]
=(3-m)/(2m-4)÷[(m^2-9)/(m-2)]
=(3-m)/(2m-4)÷[(m-3)(m+3)/(m-2)]
=(3-m)/(2m-4)*(m-2)/(m-3)(m+3)
=-(m-3)/2(m-2)*(m-2)/(m-3)(m+3)
=-1/2(m+3)
=-1/(2m+6)
=(3-m)/(2m-4)÷[(m^2-4-5)/(m-2)]
=(3-m)/(2m-4)÷[(m^2-9)/(m-2)]
=(3-m)/(2m-4)÷[(m-3)(m+3)/(m-2)]
=(3-m)/(2m-4)*(m-2)/(m-3)(m+3)
=-(m-3)/2(m-2)*(m-2)/(m-3)(m+3)
=-1/2(m+3)
=-1/(2m+6)
(m+3m+5m+.+2008m)-(2m+4m+6m+.+2009m)
(m+3m+5m+...+2009m)-(2m+4m+6m+...2008m)
m-2m-3m+4m-5m-6m+7m.2004m=?
计算:(m+3m+5m+...+2009m)-(2m+4m+6m+...+2010m)
(m+3m+5m+...+2013m)-(2m+4m+6m+...+2012m)
(m+3m+5m.+2013m)-(2m+4m+6m+.+2012m)=?
(m+3m+5m+...+2014m)-(2m+4m+6m+...+2013m)
(m+3m+5m+...+2015m)-(2m+4m+6m+...+2014m)=
m+3m+5m+...+2011m-2m-4m-...-2010m等于多少?
(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+7m+.+2009m)-(2m-4m-6m-.-2008m)=?