K
khai29112998


chứng minh đẳng thức sau:
$$(C_{2012}^0)^2 - (C_{2012}^1)^2 + (C_{2012}^2)^2 - ...+(C_{2012}^{2012})^2 = C_{2012}^{1006}$$
$$(C_{2012}^0)^2 - (C_{2012}^1)^2 + (C_{2012}^2)^2 - ...+(C_{2012}^{2012})^2 = C_{2012}^{1006}$$