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Differentiability: Theorems & Proofs Video Lecture | Mathematics for IIT JAM, GATE, CSIR NET, UGC NET

FAQs on Differentiability: Theorems & Proofs Video Lecture - Mathematics for IIT JAM, GATE, CSIR NET, UGC NET

1. What is the definition of differentiability?
Ans. Differentiability is a property of functions that describes their smoothness and ability to be approximated by a linear function at a specific point. A function is said to be differentiable at a point if its derivative exists at that point.
2. What are the conditions for differentiability?
Ans. In order for a function to be differentiable at a point, it must satisfy two conditions: (1) the function must be continuous at that point, and (2) the limit of the difference quotient, which represents the derivative, must exist.
3. What is the differentiability theorem?
Ans. The differentiability theorem states that if a function is differentiable at a point, then it must be continuous at that point. In other words, differentiability implies continuity.
4. How can the differentiability of a function be proved?
Ans. The differentiability of a function can be proved using the definition of the derivative. By showing that the limit of the difference quotient exists as the independent variable approaches a specific point, one can establish the differentiability of the function at that point.
5. Are all continuous functions differentiable?
Ans. No, not all continuous functions are differentiable. While differentiability implies continuity, the converse is not true. There exist functions that are continuous at a point but fail to have a derivative at that point. An example of such a function is the absolute value function at x=0.

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