三次函数的性质及若干应用

AbstractThis paper mainly discusses the properties of the three function and its application,through literature research,the three functions of monotonicity,extreme value,the real root ofcubic equation and the image characteristics and relevant properties of the three functions aresummarized,and the related theorem to prove that,on the basis of the combination of scienceof Jiangsu province college entrance examination examination paper in recent years and sim-ulate the topic above nature was applied to solve several problems,mainly involving three fu-nction most value problem,the zero point problem is parsed and the problem of symmetry.Key words:Cubic function;Monotonicity;Symmetry Zero;Extreme value