Cho abc=1. CM: a/(a+b^4+c^4)+b/(b+c^4+a^4)+c/(c+a^4+b^4)<=1

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Cho abc=1. CM: a/(a+b^4+c^4)+b/(b+c^4+a^4)+c/(c+a^4+b^4)<=1

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Adela 4 years 2020-10-28T19:45:12+00:00 0 Answers 44 views 0

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )