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	Các bình luận về: Đề bài: Tính tổng T tất cả các nghiệm của phương trình \({4.9^x} &#8211; {13.6^x} + {9.4^x} = 0.\)	</title>
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	<description>Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online</description>
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