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	Các bình luận về: Có bao nhiêu cặp số nguyên \(\left( {x{\rm{ }};{\rm{ }}y} \right)\) với \(x{\rm{ }};{\rm{ }}y\) nhận giá trị trong đoạn \(\left[ {{\rm{0 }};{\rm{ 2021}}} \right]\) sao cho \(y &#8211; x &#8211; 2 \ge 0\) và \({4.2^x} &#8211; {2^y} + 3(x &#8211; y) + 6 \ge 0\).
A. 2019.	B. 2020.	C.2021.	D. 2022.	</title>
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