在解题时,数形结合思想应用相当广泛,有很大的灵活性、创造性,但学生往往对如何构建图像缺乏深刻的理解,常会陷入困境,为此,笔者总结出利用代数条件构造图像的几个切入点。供读者参考学习。1由函数式直接切入图像例1二次函数f(x)=ax~2+bx+c,满足f(-1)= In the process of solving problems, the idea of ​​combination of number and shape is widely used and has great flexibility and creativity. However, students often do not have a deep understanding of how to construct an image and often get into trouble. Therefore, the author concludes that using algebraic conditions to construct images Several entry points. Reference for readers to learn. 1 By function directly into the image example 1 quadratic function f (x) = ax ~ 2 + bx + c, to satisfy f (-1) =