论文部分内容阅读
本文向同学们介绍一个一元二次方程ax~2+bx+c=0(a≠0)根的判别式Δ=b~2-4ac在解某些竞赛题时所起的绝妙效果,供同学们学习时参考,下面举例说明它的十六种应用.
This paper introduces students to a class of quadratic equations ax ~ 2 + bx + c = 0 (a ≠ 0) roots of the discriminant Δ = b ~ 2-4ac in solving some competition questions wonderful effect, for students They learn reference, the following examples illustrate its 16 kinds of applications.