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关于二次函数f(x)=ax2+bx+c在(-∞,+∞)上的最值问题,大家已经比较清楚.但是,在闭区间上的最值情况又如何呢?本文通过讨论,将给出一个定性的估计
The question of the maximum value of the quadratic function f(x)=ax2+bx+c on (-∞,+∞) has been relatively clear. But what about the maximum value in the closed interval? This article discusses Will give a qualitative estimate