The electronic version of the compulsory four textbooks for senior high school mathematics is the electronic version of the book, which is full of basic knowledge and solutions. It's not difficult.

The fourth compulsory textbook of senior high school mathematics is the fourth in the series of books, new curriculum standard textbooks and compulsory textbooks published by People's Education Publishing House in 2007, and the fourth edition of the compulsory mathematics textbook of ordinary senior high school curriculum standard experiment.