函数f(x)在x=a处的导数f’(a),其几何意义为f(x)的图象在该点处切线的斜率,通常用来描述函数上升或者下降趋势,是高中数学研究的重要内容.而函数f(x)的二阶导数f″(x)在课程标准教学要求中并未出现,但是如果能够了解函数二阶导数的几何意义,在数学解题中恰当地加以运用,往往可以起到事半功倍的作用.二阶导数即导数的导数,体现了导数的 The derivative f ’(a) of the function f (x) at x = a, the geometry of which is f (x), at which point the slope of the tangential line, usually used to describe the rising or falling trend of a function, is a high school math (X) does not appear in the standard teaching requirements, but if we can understand the geometrical significance of the second derivative of the function, it is appropriate Use, often can play a multiplier effect. The second derivative of the derivatives of the derivative, which reflects the derivative