Cho a,b,c >0 thỏa mãn ab+bc+ca=20
Tìm GTNN của $P=\frac{3a+3b+2c}{\sqrt{6(a^2+20)}+\sqrt{6(b^2+20)}+\sqrt{(c^2+20)}}$
bài tương tự đó chị :) –  Confusion 13-07-16 04:41 PM
http://toan.hoctainha.vn/Hoi-Dap/Cau-Hoi/135039/chi-up-bua-nhe-jin-chac-may-bai-nay-e-lm-nh-r-gtnn –  Confusion 13-07-16 04:40 PM
em cauchy cái mẫu là dc òi –  ๖ۣۜJinღ๖ۣۜKaido 13-07-16 10:15 AM

bị xóa vì bị trùng bởi Confusion 13-07-16 04:41 PM

Câu hỏi này có nội dung hoàn toàn trùng với câu hỏi đã có.

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