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Re:能解释一下吗？

Posted by AHshua at 2010-10-27 10:09:13 on Problem 2663
In Reply To:Re:能解释一下吗？ Posted by:19910517 at 2010-06-01 21:47:18 
> 先有公式：f(x)=f(x-2)*3+f(x-4)*2+f(x-6)*2+...+f(0)*2;
> 则：      f(x-2)*3=f(x-2)*4-f(x-2)=
>                f(x-2)*4 -(  f(x-4)*3+f(x-6)*2+...+f(0)*2）  ）
> 故有：    f(x)=f(x-2)*4-f(x-4);
Very good!
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