P
princess138art


Tìm Min
[TEX] P=a(x^2+y^2)+z^2[/TEX]
a ko âm ; x,y,z thoả mãn: [TEX]xy+yz+xz=1[/TEX]
[TEX] P=a(x^2+y^2)+z^2[/TEX]
a ko âm ; x,y,z thoả mãn: [TEX]xy+yz+xz=1[/TEX]
Last edited by a moderator: