$C_{m+n}^{k}=C_{n}^{0}C_{m}^{k}+C_{n}^{1}C_{m}^{k-1}+....................+C_{n}^{k}_C{m}^{0}$
Edited by Janienguyen, 14-10-2009 - 17:37.
Edited by Janienguyen, 14-10-2009 - 17:37.
sao đoc rồi mà không có ai làm vậy????????CMR
$C_{m+n}^{k}=C_{n}^{0}C_{m}^{k}+C_{n}^{1}C_{m}^{k-1}+....................+C_{n}^{k}_C{m}^{0}$
Edited by chuyentoan, 15-10-2009 - 05:24.
1 bai tuong tu nua neCMR
$C_{m+n}^{k}=C_{n}^{0}C_{m}^{k}+C_{n}^{1}C_{m}^{k-1}+....................+C_{n}^{k}_C{m}^{0}$
Edited by thuylinhbg, 24-10-2009 - 20:55.
Bài này thì tương tự, áp dụng câu trên với $n = m =k$ là được thôi.1 bai tuong tu nua ne
CMR
$C_{2n}^{n}$=$(C_{n}^{0})^2$+$(C_{n}^{1})^2$+....$(C_{n}^{n})^2$
"God made the integers, all else is the work of men"
Edited by Ho pham thieu, 26-10-2009 - 21:03.
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