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Một bài hay

Started By hoaln, 15-03-2005 - 13:53

1 reply to this topic

Chú lính chì

cho $(x_n)$ xác định bởi:
$x_1=1$

$x_{n+1}=x_n+2+[\dfrac{x_n}{n}] \forall n\ge 2$

tìm $n$ để : $x_n \vdots n$

DDTH

Chú lính chì

[quote name='hoaln' date='Mar 15 2005, 01:53 PM']cho http://dientuvietnam...metex.cgi?n=2^m với http://dientuvietnam...n/mimetex.cgi?m là số tự nhiên

Edited by hoaln, 19-03-2005 - 17:13.

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