(m-2)(m² 2m 4)-2m
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![(m-2)(m² 2m 4)-2m](/uploads/image/f/14260-4-0.jpg?t=%28m-2%29%28m%C2%B2+2m+4%29-2m)
原方程组可化为2m+14n=−62m−5n=13(1)-(2)得:n=-1,代入(2)得:m=4.所以原方程组的解为m=4n=−1.
(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
已知m是方程x²+2x-5=0的一个根则有m²+2m-5=0,m²+2m=5m4+4m3+4m²+1=(m²+2m)²+1=25+1=26
(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+n)2=10,(m-n)2=2,∴m2+2mn+n2=10,m2-2mn+n2=2,相减得:4mn=8,∴2mn=4,∴m4+n4=(m2+n2)2-2(mn)2=[(m+n)2-2mn]2-8
F=mw^2r=m(v^2/r)=mwv=m(4π^2/T)r=m4π(f^2)rF=mw^2r=m(v^2/r)=mwv=m(4π^2/T^2)r=m4π^2(f^2)rT少个平方,最后π少个平方角
按照系数大小重新排序m-2m+3m-4m……+2009m-2010m+2010m每两项组成一组结果为1005个-m加2010m=1005m
解题思路:先计算出等式左边的值,再根据值为0求出m解题过程:
m²-1=5m两边平方m^4-2m²+1=25m²m^4+1=27m²(m^4+1)/m²=27
2[(m-1)m+m(m+1)]×[(m-1)m-m(m+1)]=2(m²-m+m²+m)×(m²-m-m²-m)=2×2m²×(-2m)=-8m
(m+3m+5m+...+2009m)-(2m+4m+...+2008m)=m+(3-2)m+(5-4)m+……+(2009-2008)m=m+m+m+……+m=1005m嗯再问:有没有可能的-100
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+3m+5m+...+2009m)-(2m+4m+6m+...+2010m)=2010m/2=1005m
(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