C
chontengimoiduoc


giup minh 2 bai giai he voi
[TEX]2y^2-x^2=1[/TEX]
[TEX]2x^3-y^3=2y-x[/TEX]
bai so e
[TEX]e^{x-y} + e^{x+y}=2(x+1)[/TEX]
[TEX]e^{x+y}=x-y+1[/TEX]
[TEX]2y^2-x^2=1[/TEX]
[TEX]2x^3-y^3=2y-x[/TEX]
bai so e
[TEX]e^{x-y} + e^{x+y}=2(x+1)[/TEX]
[TEX]e^{x+y}=x-y+1[/TEX]
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