T
thaihang99


Chứng minh:
[TEX]{C}_{2n+1}^{0} + {C}_{2n+1}^{2} + {C}_{2n+1}^{4} +...+ {C}_{2n+1}^{2n} = {2}^{n}[/TEX]
[TEX]{C}_{2n+1}^{0} + {C}_{2n+1}^{2} + {C}_{2n+1}^{4} +...+ {C}_{2n+1}^{2n} = {2}^{n}[/TEX]