You'll notice that there's a little bit of a difference in these equations here from the ones from the other day, which is that you have z squared value in there.

你们会注意到这里的方程,和我们那天的方程,有些小的不一样，这里有z平方。

麻省理工公开课 - 化学原理课程节选

What's the value of this X at the end of the day?

最终X的值是多少呢？

哈佛公开课 - 计算机科学课程节选