Cho \(0\le x,y,z\le1.\)CMR \(\frac{x}{yzt+1}+\frac{y}{zxt+1}+\frac{z}{xty+1}+\frac{t}{xyz+1}\le3\)hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh ...
Đọc tiếp
Cho \(0\le x,y,z\le1.\)CMR \(\frac{x}{yzt+1}+\frac{y}{zxt+1}+\frac{z}{xty+1}+\frac{t}{xyz+1}\le3\)hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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