Mathematics
Senior High
求第一小題算法🙏
3. 如右圖的棋盤式街道,現在要從4點位置走到B點位置,試問:
(1)若可選上、下、右三種行走方向且每段路不重複經過,則共有【 256
種走法。(10分)
(2)若要經過P點且路徑長要最短,則有【
18】種走法。(15分)
1
A
P
PB
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