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Posted by conangbuongbinh on 28-01-2012 - 22:23
Tìm các số nguyên tố thỏa mãn:$x^2-2y^2=1$
Posted by conangbuongbinh on 25-01-2012 - 09:43
Mình xin góp 1 bàiTìm $x,y,z$ biết$$\frac{x^{2}}{2}+\frac{y^{2}}{3}+\frac{z^{2}}{4}=\frac{x^{2}+y^{2}+z^{2}}{5}$$