The proposition of the college entrance examination on the sequence of numbers mainly has the following three aspects; (1) series itself, including the concepts, properties, general formulas and summation formulas of arithmetic progression and geometric progression. (2) Combination of sequence with other knowledge, including combination of sequence with function, equation, inequality, triangle and geometry. (3) The application of series, in which the growth rate is the main problem. There are three levels of difficulty in the test questions. Most of the small questions are based on basic questions, and most of the answers are based on basic and intermediate questions. It's just that in some places, it's difficult to take the synthesis of sequence and geometry and the synthesis of function and inequality as the last question.

Sequence is an important content of high school mathematics and the basis of learning advanced mathematics. The examination of the College Entrance Examination is comprehensive, and the examination of arithmetic progression and geometric progression will not be missed every year. The test questions about series are often comprehensive questions, which often combine the knowledge of series with the knowledge of exponential function, logarithmic function and inequality. The test questions often combine arithmetic progression, geometric progression, seeking limit and mathematical induction. Inquiry problem is a hot spot in the college entrance examination, which often appears when solving the problem of sequence. The topic also contains rich mathematical ideas. In the subjective questions, important ideas such as function and equation, transformation and reduction, classified discussion, and basic mathematical methods such as collocation method, method of substitution method and undetermined coefficient method are emphasized.