M
miumiu34


tìm số nguyên dương n sao cho
[TEX]C^1_{2n+1} -2.2.C^2_{2n+1} +3.2^2.C^3_{2n+1} -4.2^3.C^4_{2n+1} +...+(2n+1).2^2n.C^{2n+1}_{2n+1}[/TEX]=2013
[TEX]C^1_{2n+1} -2.2.C^2_{2n+1} +3.2^2.C^3_{2n+1} -4.2^3.C^4_{2n+1} +...+(2n+1).2^2n.C^{2n+1}_{2n+1}[/TEX]=2013