化简:(2/(m+n)^3(1/m+1/n)+1/(m^2+2mn+n^2)(1/m^2+1/n^2))/((m-n)/
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化简:(2/(m+n)^3(1/m+1/n)+1/(m^2+2mn+n^2)(1/m^2+1/n^2))/((m-n)/m^3n^3)
讨论讨论
m(m+n)(m-n)-m(m+n)的平方,其中m+n=1,mn=-1/2
化简:1/(m-n)根号(m^3-2m^2n+mn^2)(m
因式分解m^2-(n+1)m+n
化简:(2/(m+n)^3(1/m+1/n)+1/(m^2+2mn+n^2)(1/m^2+1/n^2))/((m-n)/
数学题[(m+3n)(m-3n)+(2n-m^2)+5n^2(1-m)-(2m^2-m^2n)÷(-1/2mn)
(m+n)(m-n)-(1-2n)化简
mn(1/m-1/n)÷m^2-n^2/m+n
先化简(m/m-n-n/m+n+2mn/m²-n²)²÷m²+mn/m,若m=1
(1)(m^2+n^2/m-n) +2mn/n-m
1+n-m÷m²-n² --- ---- m+2n m²+4mn+4n²
1+n-m/m+2n÷m²-n²/m²+4mn+4n²=
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.