1问题提出近日,笔者所在学校部分教师到本市兄弟学校观摩学习。在一节习题课展示中,有一个环节是对2015年杭州市中考数学卷第10题的教学。设二次函数y_1=a(x-x_1)(x-x_2)(a≠0,x_1≠x_2)的图像与一次函数y_2=dx+e(d≠0)的图像交于点(x_1,0)。若函数y=y_1+y_2的图像与x轴仅有一 1 issue raised Recently, I was part of the school teachers to see the city’s brother school learning. In an exercise showcase, there is a link in the 2015 Hangzhou entrance exam math 10 teaching. Let the image of the quadratic function y_1 = a (x-x_1) (x-x_2) (a ≠ 0, x_1 ≠ x_2) and the image of the linear function y_2 = dx + e ). If the function y = y_1 + y_2 has only one image with x axis