1. (1)證明C(n,0)+ 3C (n,1)+ 5C (n,2)+...+(2n+1)C(n,n)=(n+1)2^n Σ(k=1 to n) (2k+1)*C(n,k) =Σ(k=1 to n) (2k)*n!/[k!*(n-k)!] +Σ(k=1 to n) C(n,k) =2nΣ(k=1 to n) ...
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