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Differential Calculus is one of the most important topics in the preparation of IIT JEE, AIEEE, DCE, EAMCET and other engineering entrance examinations. This is the easier part of Calculus and there is no doubt it is scoring too. It is also important to learn Differential Calculus to proficiency as it is a prerequisite to the learning of Integral Calculus too.
The importance of Differential Calculus is not just restricted to Mathematics but it is of profound importance in the major part of Physics and Physical Chemistry. The study of Differential Calculus includes Functions, Sets and Relations though it is considered to be a part of Algebra. Limits, Continuity and Differentiability is one of the most favourable topics of those who have a bent towards Differential Calculus. It is not only an easy topic but also fetches direct question in the examination. A person who has already done a good practice of this chapter is also likely to do well in the next topic of Differentiation. The lifeline of Differential Calculus is basically the topics which include the application of Derivatives i.e.Tangent and Normal and Maxima and Minima. The concept of these topics are also used frequently in Physics and some portions of Physical Chemistry
Since Differential Calculus is new to the students as they do not study it in their 10th standard examination, so they are advised to master the topic by practicing questions on Limits, Continuity and Differentiability. The preparation of Differential Calculus also gives another opportunity to prepare and revise the chapter on Functions, Sets and Relations.