若xy=m,且x^/1+y^/1=n,则(x-y)^
速
参考答案:若xy=m,且x^/1+y^/1=n,则(x-y)^
题出错了吧:
若xy=m,且1/x^+1/y^=n,则(x-y)^
(1/x-1/y)^= 1/x^+1/y^-2/xy
(y-x)^/(yx)^= 1/x^+1/y^-2/xy
(x-y)^/m^= n-2/m
(x-y)^ = nm^-2m
速
参考答案:若xy=m,且x^/1+y^/1=n,则(x-y)^
题出错了吧:
若xy=m,且1/x^+1/y^=n,则(x-y)^
(1/x-1/y)^= 1/x^+1/y^-2/xy
(y-x)^/(yx)^= 1/x^+1/y^-2/xy
(x-y)^/m^= n-2/m
(x-y)^ = nm^-2m