3^2m=5 3^n=10 3^m+n=什么?9^m+n=?9^2m+n=?第一个问题(3^m+n)可以不写
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m/n=5/3,求(m/m+n)+(m/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))
(m-n)^3(n-m)^2(m-n)=_____
.4(m+n)^2*(m+n)^3-7(m+n)(m+n)^4+5(m+n)^5=
m-[n-3m-(m-n)]=?
(3m-n)(m-2n)=()
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=
已知m/n=5/3,求m/(m+n)+m/(m-n)-n平方/(m平方-n平方)
m-{n-2m+[3m-(6m+3n)+5n]}=
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
诺2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n=
如果m,n互为相反数,求m+2m+3m+4m+5m+5n+4n+3n+2n+n=多少
已知m-2n/2m+n=5,求代数式3(m-2n)/2m+n-15(2m+n)/m-2n-2
2m+3n+2m+3n+m+2m+3n+n=______
(m-2n)(2n+m)-(-3m-4n)(4n-3m)=