Matrix problems in linear algebra

A, B, C, D, and E each borrowed a novel from the library. They agreed to exchange it with each other after reading it. The thickness of the five books and their reading speed were similar, so the five of them always exchanged books at the same time. After four exchanges, the five of them finished reading the five books.
(1)The last book A read was the second book B read.
(2)The last book C read was the fourth book B read.
(3)The second book of the third reading, Book A, was read at the beginning.
(4)The last book D read was the third book C read.
(5)The fourth book that B read was the third book that E read.
(6)The third book that D read was the one that C-1 read at the beginning.
According to the above situation, who read the first book when Ding read the second book?

Answer 1

Matrix is a very important concept in linear algebra. It can be used to represent linear transformations and a space of variables. Here are some common matrix questions:

Find the inverse of a matrix.
2 Find the determinant of a matrix.
3 Find the rank of a matrix and the quotient.
Find the inverse matrix of a linear transformation.
5 Find the linear transformation of a variable.
6 Find the inverse matrix of two matrices.
Find the linear combination of a matrix and a matrix.
Find the linear combination of a matrix and a space.
9 Find the determinants and characteristic values of a matrix.
10 Find the transformation matrix and the characteristic of a linear transformation.

The above problems could be solved by matrix operations and eigen value decomposition. At the same time, matrices had many other applications such as image processing, financial risk management, network communication, etc. Therefore, matrices were also a very important concept in mathematics.