Now, I don't have to fill my head 6 with 2.18 times 10 to the minus 18. 13.6, that's a cool number. I can remember that.
现在,我不需要记住,2。18乘10到负18,13。,那数字太给力了,我可以记住它。
And so some days I don't, I'll only have 1 or 2 classes.
所以有时候,我一天只有1或2节课。
And No.2, I think that it wasn't just spiritually impoverishing personally.
第二,我认为那不只是,个人的精神枯竭。
We say that we have very very short lives, because after all right now I've got some memories that I didn't have 2 hours ago.
我们的人生非常短暂,我现在就有一些,我2小时前没有的记忆。
All right. I tried it on 2, I surely didn't expect a precise and exact answer to that but I got something, and if you square this, you'll find the answer kept pretty darn close to 2.
好,我试试求2的平方根,我当然不希望得到一个完全准确的答案了,但是我得到了一个近似值,试试将这个数平方一下,你会发现结果和2相当接近。
T I need to answer this question, T of 2.
现在我需要得到。
Right. I don't want to give it too many different names, because F2, 3 and F3, 2 are equal and opposite.
没错,我不想用太多不同的名字,因为 F23 和 F32 大小相同方向相反
It says, in either case in general, t of b-- and this is where I'm going to abuse notation a little bit but I can basically bound it by t, 12 steps plus t of b over 2.
我可以用一个,比12+t的数代表,这里有点不准确的地方,具体的步数依赖于奇数偶数,但是你们可以看到在两个case中。
if I say a particle's location is i times t^2 plus j times 9t^3, for every value of time, you can put the numbers in and you can find the velocity by just taking derivatives.
一个质点的位置,i ? t^2 + j ? 9t^3,在每一个时间点,你可以把数值代入,并通过求导得到速度
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