K
khuong1234567


cho 3 so thoa man:a,b \geq 0
a+2b-4c+2=0
2a-b+7c-11=0
tim GTNN va GTLN cua Q=6a+7b+2006c
a+2b-4c+2=0
2a-b+7c-11=0
tim GTNN va GTLN cua Q=6a+7b+2006c
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