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中考压轴题多以数学综合题的形式出现,压轴题考查知识点多,条件也相当隐晦,这就要求学生有较强的理解问题、分析问题、解决问题的能力,对数学知识、数学方法有较强的驾驭能力,并有较强的创新意识和创新能力。动态问题能很好地展示考生的分析能力、探究能力,考查数学综合素养,而备受青睐。在近几年的中考试题中,经常出现求线段PA+PB的最小值问题,这也是初中学生较难解决的问题之一;而二次函数也是压轴题最常涉及的知识点,在此就利用轴对称性解决二次函数中线段和的最值问题进行探讨。
Most of the test questions in the form of mathematical comprehensive questions appear in the form of acupuncture points test knowledge more points, the conditions are quite obscure, which requires students to have a stronger understanding of the problem, the ability to solve problems, mathematical knowledge, mathematical methods Strong ability to control, and have a strong sense of innovation and innovation. Dynamic issues can be a good candidate to display the analytical skills, explore the ability to test mathematical comprehensive qualifications, and has been favored. In the middle school exams in recent years, it is often found that the minimum value of PA + PB in the line segment is one of the most difficult problems to be solved by junior high school students. The quadratic function is also the most frequently asked knowledge point in the finale question The axisymmetry is used to solve the most value problem of line segment sum of quadratic function.