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二次函数是初中数学的重点内容之一,其图像是一种直观形象的交流语言,含有大量丰富的有价值的信息,用好这些信息有助于培养和提高学生分析问题、解决问题的能力.为此,二次函数图像信息题便成了近年来各地中考命题的热点.二次函数图像信息题,是根据抛物线在平面直角坐标系的位置信息(包括开口方向、对称轴位置、与坐标轴交点等)来解决相关问题的一种题型.观其图,悟其道,灵活运用数形结合的思想和方法,抓住规律进行分析和推理,常常会寻找到二次函数图像信息题的诸
The quadratic function is one of the key contents of mathematics in junior high school. The image is an intuitive image of the language of exchange, contains a wealth of valuable information, make good use of these information will help to develop and improve students’ ability to analyze and solve problems .Therefore, the quadratic function image information problem has become a hot spot in the field of examinations in recent years.Secondary function image information problem, based on the parabola rectangular coordinate system position information (including the direction of the opening, the axis of symmetry, coordinates Axis intersection, etc.) to solve problems related to a problem type.View the map, enlightenment, flexible use of the combination of ideas and methods, to grasp the law of analysis and reasoning, often find the quadratic function of the image information problem All of them