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Tìm MIN $P=\frac{2x^2}{1+x^2}-\frac{2y^2}{1+y^2}+\frac{3z^2}{1+z^2}$

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Avengers98

Avengers98

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Cho $x,y,z$ dương thỏa mản $xz-zy-yx=1$

Tìm Min $P=\frac{2x^2}{1+x^2}-\frac{2y^2}{1+y^2}+\frac{3z^2}{1+z^2}$







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