Any one of those things is possible it's just the simple math that I just showed you.
以上这些都是有可能的,都是刚刚讲到的简单计算。
It's a very important point, if you see the very simple math that I'm showing up here.
这一点要特别注意,看看这个简单的数学表达式。
Somebody who's not a math major, tell me how I solve out for the maybe the math majors can't do it actually, it's too simple.
谁不是数学专业的,告诉我们怎么解呀,数学专业的觉得它太简单而不屑去解
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