若3^m=2,3^2n=5,则3^2m+4n=
若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n
如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n=
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
已知2m+n分之m-2n=3,则2m+n分之3(m-2n)+3(2m+n)分之m-2n-4(2m+n)分之5(m-2n)
若5m-3n=-4,求出2(m-n)+4(2m-n)
若m、n互为相反数,则(5m-3n)-(2m-6n)=
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
如果m,n互为相反数,求m+2m+3m+4m+5m+5n+4n+3n+2n+n=多少
3m+4n-[2m+(5m-2n)-3n]其中m=n分之一=2
|m-n|=n-m,|m|=4|n|=3,则|(m+n)|^2=_______?
1,已知3m=4n,则m/m+n +n/m-n -m^2/m^2-n^2=