用二次函数图象求方程的系数张金海关于求一元二次方程的系数的习题，常见于某些教材和习题中。对这类习题，大都是根据题设要求，直接用判别式、求根公式等列出不等式（组）求解的，解法往往比较麻烦。例如，已知方程的一个根小于１，另一个根大于，求ｍ的取值范围？若用... Using Quadratic Function Image to Find the Coefficients of Equations Zhang Jinhai’s exercises to find the coefficients of a quadratic equation are common in certain textbooks and exercises. For such exercises, most of them are based on the requirements of the questions, and the inequalities (groups) are directly solved by using discriminants, root-finding formulas, etc. The solutions are often troublesome. For example, if one root of a known equation is less than 1 and the other root is greater than, then what is the range of values ​​for m? If using...