Hello Premchand
Please check Ex 5.3, 11 of Chapter 5 Class 10 here https://www.teachoo.com/1624/514/Ex-5.3--11---If-sum-of-first%C2%A0n%C2%A0terms-of-AP-is-4n%C2%A0-%C2%A0n2/category/Ex-5.3/
Written on Aug. 24, 2017, 6:58 p.m.
Hello Premchand
Please check Ex 5.3, 11 of Chapter 5 Class 10 here https://www.teachoo.com/1624/514/Ex-5.3--11---If-sum-of-first%C2%A0n%C2%A0terms-of-AP-is-4n%C2%A0-%C2%A0n2/category/Ex-5.3/
Written on Aug. 24, 2017, 6:58 p.m.