V
vnpt222222
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với m+t=1.CM nếu m;t khác 0
ta có [TEX]\frac{t}{m^3-1}[/TEX]-[TEX]\frac{m}{t^3-1}[/TEX]=[TEX]\frac{-2(m-t)}{m^2+t^2+3}[/TEX]
ta có [TEX]\frac{t}{m^3-1}[/TEX]-[TEX]\frac{m}{t^3-1}[/TEX]=[TEX]\frac{-2(m-t)}{m^2+t^2+3}[/TEX]
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