cho n không âm . Chứng minh
$\frac{x^n(x^{n+1}+1)}{x^n +1}\leq (\frac{x+1}{2})^{2n+1}$
20-03-2012 - 17:59
19-03-2012 - 19:50
27-02-2012 - 18:17
24-02-2012 - 11:16
23-02-2012 - 17:38
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