Well, the change in f is the value of f at the upper point here, which is x0+delta x, and minus its value at the lower point P, which is f of x0, divided by delta x.
f的变量就是f在上面的点时的值，x0+deltax，减去f在下面的点P时的值，x0，再除以delta x。
Well, the change in f is the value of f at the upper point here, which is x0+delta x, and minus its value at the lower point P, which is f of x0, divided by delta x.
f的变量就是f在上面的点时的值，x0+deltax，减去f在下面的点P时的值，x0，再除以delta x。
应用推荐