The differential calculus is a method used to determine the rate of change of one quantity with respect to another. For example, the speed of an object is the rate of movement of the object with respect to time; provided that we know the equation for the movement of the object, we can determine its velocity at any point in time by differentiating the equation. Differential calculus is of great interest in all branches of engineering, and we will take a gentle approach to the topic.
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