(m-n)●(n-m)●(n-m)
化简m/(m+n)²+n/m²-n²-2n²/(m+n)(m²-n
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
mn(m-n)²-n(n-m)³=n(m-n)²( )
计算(3-m+n)*(3+m-n)-(2-m+n)*(2+m-n)
(3m-4n)(4n+3m)-(2m-n)(2m+n)
已知:m*m=n+2,n*n=m+2.求m*m*m-2mn+n*n*n(m不等于n).
(m-n)立方;+2n(n-m)平方
(m+n)(m-n)-(1-2n)化简
【(m+n)(m-n)-(m-n²)+2n(m-n)】÷4n
m×n(m和n不是0)n()等于m,n()小于m,n()大于m.
计算(m+2n/n-m)-(n/m-n)+(2m/n-m)要过程
设M,N为正整数,且M>N.求证:(M-N)/(ln M - ln N ) < (M+N)/2