If S<sub>n</sub> denotes the sum of the first r terms of an A.P. Then, S<sub>3n</sub> : (S<su…

Find the first term of an AP whose 8<sup>th</sup> and 12<sup>th</sup> terms are respectively 39 …

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

15<sup>th</sup> term of A.P., x - 7, x - 2, x + 3, ........ is

After striking the floor, a rubber ball rebounds to 4/5<sup>th</sup> of the height from which it has fallen.…

Which term of the A.P. 92, 88, 84, 80, ...... is 0?

The n<sup>th</sup> term of an A.P., the sum of whose n terms is S<sub>n</sub>, is

The 3<sup>rd</sup> and 7<sup>th</sup> term of an arithmetic progression are -9 and 11 respective…