Cho $x>2,y>1,z>0$ . Tìm Max $P=\frac{1}{2\sqrt{x^2+y^2+z^2-2(2x+y-3)}}-\frac{1}{y(x-1)(z+1)}$
$P=\frac{1}{2\sqrt{x^2+y^2+z^2-2(2x+y-3)}}-\frac{1}{y(x-1)(z+1)}$
Started By Rias Gremory, 13-05-2016 - 15:45
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