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Re:@@写个证明In Reply To:@@写个证明 Posted by:200593141 at 2008-01-07 18:31:40 > 2*n*a1 = n*a0 + n*a1 - 2*n*c1; > 2*(n-1)*a2 = (n-1)*a1 + (n-1)*a2 - 2*(n-1)*c2; > 2*(n-2)*a3 = (n-2)*a2 + (n-2)*a3 - 2*(n-2)*c3; > ... > ... > 2*2*an-1 = 2*an-2 + 2*an - 2*2*cn-1; > 2*1*an = 1*an-1 + 1*an+1 - 2*1*cn; > > 左右求和 即可把 a2-an 消掉 晕阿,您的证明写错了。。 Followed by: Post your reply here: |
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