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yeutoanhoc020

Member Since 27-07-2016
Offline Last Active 08-08-2016 - 00:00

Posted by yeutoanhoc020 on 03-08-2016 - 14:55

3.Cho x₀=(38-17.5^1/2)^1/3+(38+17.5^1/2)^1/3 là nghiệm của phương trình x³-3x²-2x+8=0

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