在二次函数的应用中,有一类以球体运行为背景的问题,如“篮球是否投中”、“足球是否进门”、“排球是否出边界”等等,本文以这三类球的运行为背景,谈谈解决此类问题的规律及异同.一、“篮球是否能投中”问题在一场篮球比赛中,队员甲正在投篮,已知球 In the application of quadratic function, there is a kind of problem that takes the running of the sphere as the background, such as whether basketball is hit or not, whether football enters the door, whether volleyball is out of bounds, Three types of ball operation as the background, to talk about the law and similarities and differences to solve such problems. A, “basketball is able to hit ” problem In a basketball game, team A is shooting, known ball