The 2<sup>nd</sup> and 6<sup>th</sup> term of an arithmetic progression are 8 and 20 respectivel…

The sum of first n odd natural numbers in

The first three terms of an A.P. respectively are 3y – 1, 3y + 5 and 5y + 1. Then, y equals

If the sum of n terms of an A.P. is 3n<sup>2</sup> + 5n then which of its terms is 164 ?

The 9<sup>th</sup> term of an A.P. is 449 and 449<sup>th</sup> term is 9. The term which is equa…

Sum of n terms of the series $$\sqrt 2 $$  $$ + $$  $$\sqrt 8 $$  $$ + $$  $$\sqrt {…

In an A.P., if d = -4, n = 7, a<sub>n</sub> = 4, then a is

If the sum of p terms of an A.P. is q and the sum of q terms is p, then the sum of (p + q) terms will be