Hi Rohit
Please check
- AP of Class 10 - https://www.teachoo.com/subjects/cbse-maths/class-10th/ch5-10th-arithmetic-progressions/
- AP of Class 11 - https://www.teachoo.com/subjects/cbse-maths/class-11th/ch9-11th-sequences-and-series/
Written on July 23, 2017, 10:33 p.m.