若m/n=2,则m+3n/m-n=谁会麻烦算一下

若m/n=2,则m+3n/m-n=谁会麻烦算一下 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=? 已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= m/n=7/3则m+n/m-n (m-n)^3(n-m)^2(m-n)=_____ 1若m=n,则|m|=|n|;2若m=—n,则|m|=|n|;3若|m|=|n|,则m=—n;4若|m|=|n|,则m=n哪个对 若（m+n)(m-n)^2-mn(m+n)=(m+n)·M,则M是 若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n)/[4(2m+n)]}的值是? (3m-n)(m-2n)=() 若(m+n)^2-mn(m+n)=(m+n)·M,则M是（） A.m^2+n^2 B.m^2-mn+n^2 C.m^2-3mn+n^2 D.m^2+mn+n^2 (m-2n/n-m)-(n/m-n)= m-[n-3m-(m-n)]=? 若|m-n|=n-m,且|m|=4、|n|=3,则（m+n)^2= 若|m-n|=n-m,且|m|=4,|n|=3,则(m+n)^2=? 若有理数m,n满足m-2n=4,2m-n=3,则m+n等于 若m^2-n^2=6,且m-n=3,则m+n=? 若m+n=0,则多项式m^3-m^3n-mn^2+n^3 若m n互为相反数 则3[m-n]-1/2[2m-10n]=?