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	Các bình luận về: Đề bài: Cho bất phương trình \(4\log _{\frac{1}{2}}^2\left( {7x} \right) &lt; 8 - 4{\log _4}\left( {49{x^2}} \right)\). Tìm tập nghiệm S của bất phương trình?	</title>
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