一元二次方程参数范围问题的又一常规解法张云飞（江苏省如皋市白蒲高级中学２２６５１１）本刊文〔１〕给出了一元二次方程参数范围问题的图像解法，读后受益匪浅．正如文〔１〕指出：含参数的一元二次方程有实数解时参数的取值范围问题是高中代数的热点与难点问题之一，... Another conventional solution to the problem of the range of parameters for one-dimensional quadratic equations Zhang Yunfei (Babu Senior High School, Rugao, Jiangsu Province 226511) This article [1] gives an image solution to the parametric range problem of the univariate quadratic equation. As pointed out in [1], the problem of the range of parameters when a unitary quadratic equation with parameters has a real solution is one of the hotspots and difficulties in high school algebra,...