What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?

The 3<sup>rd</sup> and 8<sup>th</sup> term of an arithmetic progression are -13 and 2 respective…

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…

If the sum of first n even natural number is equal to k times the sum of first n odd natural numbers, then k =

The sum of n terms of an A.P. is 3n<sup>2</sup> + 5n, then 164 is its

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

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

The 3<sup>rd</sup> and 9<sup>th</sup> term of an arithmetic progression are -8 and 10 respective…