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FrankSun · 2019年10月31日

问一道题:NO.PZ2018062016000095

问题如下图:

    

选项:

A.

B.

C.

解释:

老师,二叉树的最后一叉代表什么含义?谢谢


1 个答案

星星_品职助教 · 2019年10月31日

同学你好,

二叉树其实就是假设下一个时间点的股价只有两种可能,一种上升,一种下降。所以0时点股价是150$,1时点就有253.5$0和88.5$。你说的最后一叉就是这两个股价在下一个时间点也分别只有两种可能。例如本题253.5$在2时点只可能要么上涨到428.42$,要么只可能下跌到149.57$。同理,88.5$在2时点只可能要么上涨到149.57$,要么下跌到52.22$。

最后一叉其实理论上是四个价格,但是由于中间两个价格是一样的,所以最后就只有三个价格了。加油

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