This concept has applications in many fields, such as mathematics, physics and economics. In mathematics, the change of value can be described by differentiation, which represents the change of function at a certain point (approaching infinity). In physics, the change of value can be described by derivative, which represents the speed at which a function changes at a certain point and is the rate of change.
In economics, the change of value can be described by growth rate or decline rate, that is, the growth rate or decline rate of current value compared with the same period.
Generally speaking, the change of value is a very important concept, which can help us understand and predict the dynamic behavior of things.