And is able to then say, inside of that class definition, find the value of x.
这个类的定义这里然后取值,也可以这么说,在类的定义的里面。
And now we want to find the subset of a that has the maximum value, subject to the weight constraint.
会有一个值与其对应,现在我们想要找出满足,重量约束条件的a的最大值子集。
Then go to the x equation and demand that this be equal to the desired x value and find the time.
然后列出关于 x 的方程,令这个式子等于给定的 x,并求出时间
And then this second term, if we go to the Periodic Table, 2 we will find that the value here for hydrogen is 2.2 98 and the value for fluorine is 3.98.
再算上第二个条件,翻看元素周期表,我们查处H,F电负性分别为2,2。2,3。
Well, I could look at the value here, and compare it to the value I'm trying to find, and say the following; if the value I'm looking for is bigger than this value, where do I need to look? Just here.
然后把它和目标数做个比较,然后做出如下的判断:,如果目标值大于这个值;,那么我应该去哪找呢?对,应该在这里,对不对?不可能在那儿。
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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