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Re:为什么0的时候答案是1啊，谁能给我一个信服的解释，2乘0，都没地方了，还有啥方案可寻啊？

Posted by math_scut at 2007-10-18 14:36:47 on Problem 2506
In Reply To:为什么0的时候答案是1啊，谁能给我一个信服的解释，2乘0，都没地方了，还有啥方案可寻啊？ Posted by:huarui at 2007-02-24 17:16:12 
已知f(n)=f(n-1)+2*f(n-1)
f(1)=1;
f(2)=3;
反推f(0): 3=1*2+f(0) --> f(0)=1;
有时候，这种方法很保险。
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