论文部分内容阅读
如图1所示,函数y=f(x)在x_1到x_2区域内与横轴所围成的面积为S,则y在x_1到x_2区域内的平均值为(?)(x)=S/(x_2-x_1)．物理量的平均值不仅与x_1到x_2这一区域有关,还与选择怎样的自变量x有关．
As shown in Figure 1, the area of the function y=f(x) in the x_1 to x_2 area and the horizontal axis are S, then the average value of y in the x_1 to x_2 area is (?)(x)=S /(x_2-x_1). The average value of the physical quantity is not only related to the region from x_1 to x_2 but also related to the choice of the independent variable x.