设m>n>0,m^2+n^2=4m,则mn分之m^2-n^2的值等于A.2倍根号三B.根号三C.根号六D.三PS:(╯﹏╰)b 题是不是印错了?

设m,n满足m^2+n^2+2m+4n+5=0,求n^m的值 已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= 设m>n>0,m^2+n^2=4mn,则(m-n)^2/mn的值等于 设m,n是非零自然数,并且19n^2-98n-m=0,则m+n最小值是 设m,n是自然数,并且19n^2-98n-m=0,则m+n的最小值是多少? 设m,n为自然数,mn|m^2+n^2,则m=n (m-n)^2*(m-n)^4=? 若m^2+n^2+2m-4n+5=0,则m+n=? m^2+4m+n^2-6n+13=0,则m+n= 若m^2+n^2-6n+4m+13=0则m-n=? |m-n+2|+(m+n-4)的平方=0则m=(),n=() 设f(x)=(4m^2n^2x)/(m^2+n^2x^2)(m,n>0,0 (m-2n/n-m)-(n/m-n)= m+n/4m^-n^-m-2m/n^-4m^= 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=? 如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n= 设实数m,n满足m^2*n^2+m^2+n^2+10mn+16=0,则m= ,n= 设实数m,n满足m^2n^2-2n+8m+17=0,则n=_,m=_