K
kethongtri


ch0 a,b ,c la cac so thuc duong thoa man a+b+c= [TEX]\sqry{2}[/TEX]
tim gia tri nho nhat cua
[TEX]\sqrt{(x+y)(y+z)(z+x)}[/TEX] ( (căn(x+y)/z+ (căn(y+z))/x+ (căn(z+x))/y )
tim gia tri nho nhat cua
[TEX]\sqrt{(x+y)(y+z)(z+x)}[/TEX] ( (căn(x+y)/z+ (căn(y+z))/x+ (căn(z+x))/y )