R.D. sharma is very best books for learners and it is very well book for competetive exam. Mr. R.D. sharma is a double madallist in Ph.D. mathematics. There are many questions in a book to finish the doughts of every questions, with starting low level questions to high level questions with many methods. Which make a student very brilliant. You can also do preperation for board exams and other competetive exam. The book R.D. Sharma have many important questions in each chapters for board and other top level competetion.
There have unique features in this book:
1) Large numbers of graded solved and unsolved examples.
2) Detalied theory with illustrations
3) Brief Summary consisting of concepts and formula
4) Many important qestion for board exam amd other competitive exam
5) Algorithim approach.