Postgraduate entrance examination 303 is the code for postgraduate entrance examination, which stands for Mathematics III. Postgraduate entrance examination 303 is a subject code, the purpose of which is to distinguish various examination subjects. Professional code is usually used by us to inquire about the specific introduction of a certain major in the school, as well as to understand their examination subjects and bibliography. Postgraduate entrance examination 303 is mathematics three, using calculus, linear algebra, probability theory and data statistics as teaching materials. Its examination scope includes calculus, function, limit, the concept and expression of continuous examination content function, boundedness, monotonicity, periodicity and parity of function, inverse function, compound function, implicit function, the nature of basic elementary function of piecewise function, and graphic elementary function.