It is difficult. According to the query of official website of Peking University University, mathematical analysis is an important basic course of applied statistics. In 2022, 1023 students took part in the major of mathematical analysis, and 5 12 students passed the final exam, with a passing rate of only 50%. Therefore, it is difficult. They mainly studied the systematic knowledge of limit theory, unary function calculus, series theory and multivariate function calculus.