Sequence is the content of compulsory five in senior high school mathematics.

The main content of "sequence" is the concept and representation of sequence, and the sum of the general terms and the first n terms of arithmetic progression and geometric progression. As a special function, sequence is a basic mathematical model reflecting the laws of nature.

The textbook "Compulsory Mathematics 5 in Senior High School" includes three chapters: solving triangles, series and inequalities.