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Re:能解释一下吗?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! Followed by: Post your reply here: |
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