Mathematics is divided into Math I, Math II and Math III, with full mark 150 and time 180 minutes. 22. The time for the mathematics examination for postgraduate entrance examination is 8:30-65:38+0:30 am on February 26th, 20265438, and the answers are closed. Calculators are not allowed.
Multiple choice questions: 10, with 5 points for each question and ***50 points; Fill in the blanks: 6 questions, 5 points for each question, ***30 points; Answer the proof question (hereinafter referred to as the big question): 6 questions, ***70 points.
Math 1 and 3:
Advanced mathematics, 90 points, accounting for 60%; 4 multiple-choice questions, 4 fill-in-the-blank questions and 5 big questions; Linear algebra, 30 points, accounting for 20%; 2 multiple-choice questions, 1 fill in the blanks, and 2 big questions; Probability theory and mathematical statistics, 30 points, accounting for 20%; 2 multiple-choice questions, 1 fill-in-the-blank questions and 2 big questions.
Math 2:
Advanced mathematics, 120, accounting for 80%; 6 multiple-choice questions, 5 fill-in-the-blank questions and 7 big questions; Linear algebra, 30 points, accounting for 20%; 2 multiple-choice questions, 1 fill-in-the-blank questions and 2 big questions.
Problem-solving skills of multiple-choice questions in mathematics for postgraduate entrance examination;
1, direct deduction: direct deduction is direct analysis deduction.
Direct deduction is based on conditions, using relevant knowledge to directly analyze, deduce or calculate the results, so as to make correct judgments and choices. This method is generally used to calculate multiple-choice questions and is also commonly used in other types of questions. This is the most basic, commonly used and important method.
2. Inverse deduction method: Inverse deduction method is reverse deduction or reverse substitution method.
The reverse deduction method is to use options (that is, multiple-choice options) to reverse the conditions, eliminate the options that contradict the conditions, and the ones that meet the conditions are the correct ones, or substitute one or several options in turn into the topic setting conditions for verification and analysis, and the ones that meet the topic setting conditions are the correct ones.
Step 3 reduce to absurdity
Among the four options of multiple-choice questions, if one option is assumed to be incorrect (or correct) and contradictions can be deduced, it means that the option is correct (or incorrect). When choosing which option to start with, you must analyze and judge according to the conditions of the topic, and sometimes you may need some intuition.
4. Counterexample method
If an option is a proposition, to exclude it or explain that the proposition is wrong, sometimes just give a counterexample. Counterexamples are usually some commonly used, simple but illustrative examples. If we pay due attention to accumulating different counterexamples related to various knowledge points when reviewing or doing problems, it may come in handy in the exam.
5. Special case method (special value method)
If the topic is a universal proposition, you can try to take one or several special situations and special values to verify which options are correct and which are wrong, or which options are likely to be correct or wrong, so as to make the right choice.
The special case method is particularly effective in the following situations:
When the conditions and conclusions are universal, take special cases to determine or exclude certain options; When it is necessary to prove that the conclusion that is not valid or likely to be invalid is wrong by giving counterexamples; For some problems that are difficult to judge, assume that it is correct under special circumstances.
6. Number-shape combination method
Draw the corresponding geometric figures according to the conditions, and analyze them by combining mathematical expressions and figures, so as to make correct judgments and choices. This method is often used in multiple-choice questions related to geometric figures, such as: geometric meaning of definite integral, calculation of double integral, curve and surface integral, etc.
7. Exclusion method
If three of the four options can be excluded by one or more methods, then the remaining one is of course the correct option, or two of the four options can be excluded first, and then the remaining two can be judged.
8. Intuitive method
If you still can't make a choice by the above methods, then make a choice by intuition or first impression. Although intuition is not very reliable, it can be used as a reference, and people's intuition or first impression sometimes plays a role.