已知3^M=6,9^N=2,求2^2M-4N+1
已知3^M=6,9^N=2,求2^2M-4N+1
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
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m=1/3,n=1/27,求m-n/根号m-根号n+(m+4n-4根号mn)/根号m-2根号n
已知4m+n=9,2m-3n=1,求(m+2n)²-(3m-n)²的值
已知4M+N=9,2M-3N=1,求(M+2N)²-(3M-N)²的值
已知3n-2m-1=0,求,(1)6n-4m的值;(2)(m+n)-(3m-2n-7)的值
已知4^m=6,8^n=2,求2^2m-3n+1
已知2m-3n/3m+n=2,求4m-6n/9m+3n+18m+6n/4m-6n的值
已知2m-3n/3m+n=2 求(4m-6n/9m+3n)+(18m+6n/4m-6n)的值.要有步骤和讲解.
已知4|m+n|+4m^2+1=4m,求根号(m-n)^2.
已知m-2n=3.求[(3m+2n)(3m-2n)-(m+2n)(5m-2n)]÷1/3 m 的值.