函数的零点是使函数y=f(x)的值为零的自变量x的值,从方程角度看函数零点就是使得方程f(x)=0的根,从图像角度看函数零点就是函数y=f(x)的图像与x轴交点的横坐标。由此可见,函数零点问题是一个问题的三个不同的视角,其等价关系如图1所示。 The zero point of the function is the value of the argument x that makes the value of the function y=f(x) be zero. From the perspective of the equation, the function zero is the root that makes the equation f(x)=0, and the function zero is the function y from the image point of view. The abscissa of the intersection of the image with the x-axis. It can be seen that the function zero problem is a problem of three different perspectives, and its equivalence relationship is shown in Figure 1.