This textbook is very detailed and it may be-- I've had some reaction by students-- more than you wanted to know.
这本教材编写得非常详细,也许会,我听到过许多学生的反馈,涵盖面实在是太广了
Maybe it was because it was filling in gaps in my knowledge-- things I've always wanted to know and was always curious about.
也许是因为它弥补了我知识上的缺陷,那些知识是我一直想要了解的
And I'm going to get minus 2, which came from here: minus 2 and that is in fact negative, which is what I wanted to know.
最后只剩下-2了,2是一个负数,这正是我想要的
The only place q1 appears here is here, so when I differentiate again I'm going to get -2b and sure enough that's negative, which is what I wanted to know, just to check that when I'm finding this thing, I'm finding a maximum and not a minimum.
只有这一处有q1,因此二阶导数是-2b,它肯定是个负数了,这正是我们想得到的结果,这就验证了我们刚才得出的,是最大值而不是最小值
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