2m-4 m-2=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/16 09:41:55
![2m-4 m-2=?](/uploads/image/f/260199-63-9.jpg?t=2m-4+m-2%3D%3F)
(m+2/m²-2m)-(m-1/m²-4m+4)÷(m-1/m)=(m+2)/m(m-2)-(m-1)/(m-2)^2*m/(m-1)=(m+2)/m(m-2)-m/(m-2)^
(m+3m+5m+.+2009m)-(2m+4m+6m+.+2008m)=2009m
=m(m-2)/(2-m)(2+m)=-m/(m+2)
3m-2m=m5m-4m=m……2009m-2008m=m相当于m+m+m+……m总共2009答案2009m
(m+3m+5m+7m+.+2009m)-(2m+4m+6m+.+2008m)=(1+3+5+7+.+2009)m-(2+4+6+.+2008)m=【(1+2009)×1005÷2-(2+2008)×
(m^3-2m^2+m)/(m^3-m)=(m^2-2m-1)/(m^2-1)=(m-1)^2/(m-1)(m+1)=(m-1)/(m+1)=2010/2012
=(m-2)²/(m+1)(m-1)*(m+1)/m-2+2/m-1=(m-2)/(m-1)+2/m-1=m/m-1=2
原式=(1+2015)m/(2×2)-(2+2014)m/(2×2)=0
原式={[3m(m-2)-m(m+2)]/(m+2)(m-2)}/[2m/(m²-4)]=[(3m²-6m-m²-2m)/(m²-4)]/[2m/(m²
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
前面括号和后面括号里是:各有(1+2009)/2=1005项去掉括号,写成1-2+3-4+5-6.+2009-2010相当于1005个-1相加,最后是-1005
(m+3m+5m+...+2009m)-(2m+4m+6m+...+2010m)=2010m/2=1005m
2010m/2=1005m(m+3m+5m+…+2011m)-(2m+4m+6m+…+2010m)=(m+3m+5m+…+2011m)-2m-4m-6m-...-2010m=m-2m+3m-4m+5m
(1m+3m+5m+...+2009m)-(2m+4m+6m+...+2008m)=1m+3m+5m+...+2009m-2m-4m-6m-...-2008m=1m+(3m-2m)+(5m-4m)+.
=(m-2m)+(3m-4m)+.(一共2010/2=1005项)+2011m=-1005m+2011m=1006m
原式=-[(2m+4m+6m+……+2012m)-(m+3m+5m+……+2011m)]=-[(2m-m)+(3m-2m)+……+(2012m-2011m)]=-[m+m+……+m]有2012/2=1
(m+3m+5m+...+2013m)-(2m+4m+6m+...+2012m)=(2013m-2012m)+(2011m-2010m)+...+(5m-4m)+(3m-2m)+m=m+m+...+m
(m2013m)*1007/2-(2m2012m)*1006/2=1007m
原式=m+3m+5m+.2014m-2m-4m-6m-.2013m=m-2m+3m-4m+5m-6m=m+(3m-2m)+(5m-4m)+(2014m-2013m)=m+m+.1007个m=1007m
=m+(3m-2m)+(5m-4m)+……+(2015m-2014m)=m+1007m=1008m