不解方程组2m-n=3和4m+3n=1求5n(2m-n)^-2(n-2m)^的值
不解方程组2m-n=3和4m+3n=1求5n(2m-n)^-2(n-2m)^的值
不解方程组{2m+n=6.m-3n=1},求7n(m-3n)^2-2(3n-m)^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
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
已知m-2n=3.求[(3m+2n)(3m-2n)-(m+2n)(5m-2n)]÷1/3 m 的值.
m+n=3,m·n=-2,求m和n的值
已知M=1/3,N=1/27,求(M-N/根号M-根号N)+(M+4N-4根号MN/根号M-2N)的值.
已知|2m-n/m+2n|=3,求2(2m-n)/m+2n-2m-n/m+2n-3的值
若(3m-2n+1)与|5m=2n-n|互为相反数,求m+n的值
当m-n/m+n=3时,求代数式(3m+3n/m-n)-(m-n/m+n)^2的值为多少?
已知m/n=5/3,求分式m/(m+n)+m/(m-n)-n^2/(m^2-n^2)的值