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Where can I find the answers to college textbooks?
The answers to college textbooks can be found in libraries, offices and online.

Go to the school library. Generally, school libraries will have exercise analysis books of corresponding disciplines. The borrowing rules of each school library are different, so I won't introduce this in detail, just use WeChat official account. The first is to search on WeChat, and you can come out with search results.

How do universities learn?

There are several routines about math problems, and these routines always revolve around a knowledge point. Mastering several basic routines will gradually deepen the understanding of a concept. Whenever a new problem-solving routine is found, there will be a feeling that there is such an operation in the world.

In fact, many things in the textbook will not be used in the future, but it is the foundation. After engineering (mechanical engineering) graduate students, except for higher numbers used in numerical analysis, the rest are rarely used; Matrix analysis will use some knowledge of linear algebra, but only in the first chapter.

Click Follow, and after paying attention, you can send your question to the official WeChat account, which can be in the form of pictures or text. You can search directly. There are several similar official WeChat accounts. After my careful comparison, this official WeChat account information is more comprehensive and can save you a lot of time.