Lim Zn = Z
The meaning of rough speaking is that when N has become very large: Zn becomes difficult to distinguish between Z. Execusive statement is when N is large enough | Zn - z | Any small. More specifically, some of the absolute values of the number of items and the limits of the number of the number of extracts | Zn - z | become more than any pre-determined number of positive numbers, but as long as N is large enough Ok.
Oh, this is much better than the dream of some mathematics books. I feel that the biggest abilities of domestic mathematics books and mathematics teachers are to make mathematics do not have a beautiful, can't stimulate the driving force of learning. I have the deepest impression that the linear algebra when I read the book, the teacher is very boring, a series of 90 people don't listen to it. But I calm down, huh, it is quite interesting.
I feel that the domestic university teacher has a lot of secondary schools than whether teaching methods or teaching attitudes. If one day I am doing a teacher, what will it be? :-)
