$C_{n-1}^{k-1}+C_{n-2}^{k-1}+C_{n-3}^{k-1}+...+C_{k-1}^{k-1}=C_n^{k}$
CM: $C_{n-1}^{k-1}+C_{n-2}^{k-1}+C_{n-3}^{k-1}+...+C_{k-1}^{k-1}=C_n^{k}$
Started By nasho_god, 24-08-2021 - 11:13
#2
Posted 24-08-2021 - 13:53
perfectstrong
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- Quản lý Toán Ứng dụng
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- 5030 posts
$LOVE(x)|_{x =\alpha}^\Omega=+\infty$
- DOTOANNANG likes this
Luôn yêu để sống, luôn sống để học toán, luôn học toán để yêu!!! 
$$\text{LOVE}\left( x \right)|_{x = \alpha}^\Omega = + \infty $$
I'm still there everywhere.
$$\text{LOVE}\left( x \right)|_{x = \alpha}^\Omega = + \infty $$
I'm still there everywhere.
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