" Differential Calculus" by Das Gupta is a comprehensive textbook that covers the basics of differential calculus, including limits, derivatives, and applications of derivatives. The book is written in a clear and concise manner, making it easy for readers to understand complex concepts. The author, Das Gupta, has extensive experience in teaching mathematics and has written several textbooks on the subject.

3. Pedagogical features likely present

• Worked examples immediately following definitions/theorems.
• Step-by-step solved problems highlighting common mistakes.
• Exercises grouped by difficulty with hints or answers for selected problems.
• Geometric figures illustrating tangents, secants, concavity.
• Emphasis on both computational techniques and theoretical proofs.

Expansion & Series: Detailed explanations of Taylor’s and Maclaurin’s theorems.

This book is not for the faint of heart. It is designed for students who have moved beyond high school calculus and are looking for a rigorous treatment of the subject with a focus on theorems, proofs, and complex problem-solving.

1. Buy a Physical Copy: The latest edition is available on Amazon India, Flipkart, and U.N. Dhur & Sons' official website. The tactile experience of solving problems on paper is scientifically proven to improve retention.
2. Legal E-books: Check if the publisher has released an official e-book via KopyKitab, Google Play Books, or Routledge (for international editions).
3. Library Access: Many school and coaching institute libraries (e.g., Allen, FIITJEE, Aakash) keep multiple copies.

The practical application of derivatives to find optimal values, crucial for physics and economics. 4. Educational Significance

Your paper can focus on how Das Gupta presents these critical topics:

• Google Books
• Amazon Kindle Store
• Online libraries and repositories