Useful. The instruction manual for college students' mathematics competition was written by Xiao Jing. Closely related to the Outline of College Students' Mathematics Competition, it is compiled according to the content requirements of the national college students' mathematics competition (mathematics) for competition guidance. The book consists of seven chapters, mainly covering the basic contents of the core courses of undergraduate mathematics foundation, such as mathematical analysis, advanced algebra and analytic geometry. It is very useful for students who take part in math competitions and is worth recommending to buy.