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Bài 1 : Cho x,y,z > 0 , x+y+z 6
Tìm min S = :frac{x^3}{y} + :frac{y^3}{z} + :frac{z^3}{x}
Bài 2 : Cho x,y,z > 0 xy+yz+xz=5
Tìm min P = :frac{3x+3y+2z}{ :sqrt{6(x^2+5)} + :sqrt{6(y^2+5)} + :sqrt{z^2+5} }
Tìm min S = :frac{x^3}{y} + :frac{y^3}{z} + :frac{z^3}{x}
Bài 2 : Cho x,y,z > 0 xy+yz+xz=5
Tìm min P = :frac{3x+3y+2z}{ :sqrt{6(x^2+5)} + :sqrt{6(y^2+5)} + :sqrt{z^2+5} }