论文部分内容阅读
二次函数信息题是中考的热点.根据图像信息或表格信息解答相关问题,需要较强的观察能力和信息处理能力.数形结合在解决这类问题中起着关键作用.一、图像的平移例1(2015年岳阳卷)如图1,已知抛物线y=ax~2+bx+c与x轴交于A、B两点,顶点C的纵坐标为-2,现将抛物线向右平移2个单位,得到抛物线y=a_1x~2+b_1x+c_1,则下列结论正确的是.(写出所有正确结论的序号)
The quadratic function information problem is a hot spot in the exam.According to the image information or form information to answer the related questions, we need strong observation ability and information processing ability.The combination of the number shape plays a key role in solving such problems. Example 1 (2015 Yueyang volume) As shown in Figure 1, it is known that the parabola y = ax ~ 2 + bx + c intersects the x axis at two points A and B, and the vertical coordinate of the vertex C is -2. 2 units, get the parabola y = a_1x ~ 2 + b_1x + c_1, the following conclusion is correct. (Write the correct conclusion of all the serial number)