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kiucbuon_hpv


2. Cho [TEX]0<a<b \leq c \leq 1[/TEX] thỏa mãn: [TEX]3a +2b + c \leq 4[/TEX]
CMR:
[TEX]3a^2 + 2b^2 +c^2 \leq \frac{16}{3}[/TEX]
CMR:
[TEX]3a^2 + 2b^2 +c^2 \leq \frac{16}{3}[/TEX]
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