You're looking for the PDF of "Objective Mathematics" by RD Sharma!
The book is designed to help students develop a strong foundation in mathematics and improve their problem-solving skills.
"Objective Mathematics" by RD Sharma is a popular book among students preparing for various competitive exams, including JEE Main and Advanced, CBSE, and other engineering entrance exams. The book is known for its comprehensive coverage of mathematical concepts and practice problems.
While his standard "Mathematics for Class" series is famous for school exams, the (often called the Vol. 1 & 2 set) is the go-to weapon for droppers and serious JEE aspirants.