This year's math paper also sends a new signal, that is, it is ineffective to test, do problems and grade based on the current sea of questions. Instead, it advocates how to use mathematical knowledge and mathematical thinking to solve some life problems. The solution of these problems is the basic source of scores.
Math answering routines for college entrance examination
1, the problem of mathematical function or equation or inequality in college entrance examination, first think directly and then establish the relationship between them. Consider the domain first, and then use the "three-in-one theorem".
2. If there is a transcendental expression in an equation or inequality, the thinking method of combining numbers and shapes is preferred.
3. Inequality problems of multiple-choice questions and fill-in-the-blank questions in the college entrance examination, optimized by special value method.
4. To find the value range of parameters, we should establish an equation or inequality about parameters, and use the definition or value range of functions or solve inequalities. In the process of deforming the formula, the method of separating parameters is optimized.
5. The problem of constant establishment or its opposite can be transformed into a maximum problem. Pay attention to the application of quadratic function, flexibly use the maximum value on the closed interval, and the idea of classification discussion is not repeated or omitted.
6. First of all, we should make clear the topic of conic curve, and also consider the intersection of straight line and circular curve. If it is related to the midpoint of the chord, we should choose the method of setting rather than finding the point difference, regardless of the midpoint of the chord, we should choose the method of Vieta theorem formula. When using Vieta theorem, we should first consider whether it is the discriminant of the sum of squares and roots.