T
ththbode


Cho a,b,c là 3 số dương t/m ab+bc+ca=3. CMR
[TEX]4+\sqrt{2(a^2+1)(1+c^2)(1+b^2)} \geq (1+a)(1+b)(1+c)[/TEX]
[TEX]4+\sqrt{2(a^2+1)(1+c^2)(1+b^2)} \geq (1+a)(1+b)(1+c)[/TEX]
Last edited by a moderator: