I talked about life is not like a mathematic problem ? with you or in my other class ?
我说过生活不是个数学难题,是跟你们说过?,还是在我另外的课上?
But I know today in my math class, we were learning about the guys who created RSA Public Key Cryptography.
但是今天的数学课上,我们在学习RSA公钥加密算法的创始人。
So, what we are going to study now is a non-living object and we're going to pick it to be a mathematical point.
我们现在所要研究的的,是一个没有生命的物体,我们要把它看作一个数学上的点
But mathematically, we've mentioned this before, log N or really to be precise, log base 2 of N, is the way you express this mathematically.
但从数学上说,之前我们已经提到过了,准确地说是log,N,以2为底N的对数,这就是它在数学上的表示。
So, that's sort of the mathematically how we get to a, but we can also just look at the graph here, because every time we go one wavelength we can see that we're back in a maximum.
这是就我们得到a的数学,办法,但我们可以直接,从图上看,因为每次我们,经过一个波长,都回到一个最大值。
Mathematically, it's done by taking the expression for R and differentiating everything in sight that can be differentiated as vector t.
从数学上看是这样的,写出 R 的表达式,并对所有可以进行矢量微分的部分,对时间 t 求微商
So I don't know your mathematical background, but the textbook has an appendix, which is a reasonable measure of how much math you should know.
我不太清楚你们的数学功底,但教材上有附录,它能清楚地告诉你,你应该掌握多少数学
So the object is a mathematical point.
这个物体就是一个数学意义上的点
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