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	Các bình luận về: Có bao nhiêu số nguyên dương \(y\) sao cho ứng với mỗi \(y\) thì bất phương trình\(({3^x} + x{.3^x} + 9)({3^x} &#8211; y) &#060; 0\) có đúng 5 nghiệm nguyên dương \(x\)?&#160;	</title>
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