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二次函数是描述现实世界变量之间关系的重要数学模型,也是某些单变量最优化的数学模型,二次函数与各方面数学知识的广泛联系和应用价值,能明白“函数既来源于现实生活,又服务于现实生活”的道理。初中二次函数的内容比较抽象,多数学生学习起来比较困难。而二次函数的应用题是各地中考的热点问题,同时也是压轴题之一,的确又是学生难学的问题之一。因此,对于二次函数的应用题教学,作为教师应注意分析中考题型的特点和学生在学习二次函数过程中存在的困难,作出深入的研究探讨以有助于学生的学与教师的教。
Quadratic function is an important mathematical model to describe the relationship between the real-world variables, and is also a mathematical model of certain univariate optimization. The quadratic function is widely connected with the application of various mathematical knowledge, and it can be understood that the function “ Real life, but also serve the real life ”truth. The secondary function of junior high school is more abstract in content, and most students are more difficult to learn. The application of the quadratic function problem is the hot spot around the exam, but also one of the finale, is indeed one of the problems students difficult to learn. Therefore, for the application of quadratic function teaching, as a teacher should pay attention to analyze the characteristics of the test questions and students in learning quadratic function of the existing difficulties, make in-depth study to help students learn and teachers of teaching .