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a1=a2=a3=1,a(n)=a(n-1)+a(n-2)+a(n-3),n>=4
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8Â¥: Originally posted by feixiaolin at 2013-11-03 10:11:23
n<=3
an=1
n>3
an = 0.236839844616506*EXP(0.609377863439241*3) *(EXP(0.609377863439241))^(n-3)...

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http://wenku.baidu.com/view/714368a8b9d528ea81c77930.html
9Â¥2013-11-03 10:53:40
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soliton923: лл²ÎÓë 2013-11-03 19:27:12
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an= 0.2415*exp(0.6084*n)
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2Â¥2013-11-02 17:59:54
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askuyue

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(-.6184199223-0.3740116622e-1*I)*(-.4196433776+.6062907292*I)^n+(-.6184199223+0.3740116622e-1*I)*(-.4196433776-.6062907292*I)^n+.2368398446*1.839286755^n
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3Â¥2013-11-02 22:11:36
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soliton923: лл²ÎÓëÌÖÂÛ 2013-11-03 19:27:29
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a(n) = (a+b*I)*(c+d*I)^n+(a-b*I)*(c-d*I)^n+e*f^n;
È»ºó¸ù¾Ýa(1)=a(2)=a(3)=1,a(4)=3´øÈëÇó½âa(n)£¬Ï£Íû¿ÉÒÔ°ïÖúÄãµÄ¡£
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4Â¥2013-11-02 22:17:39
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