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…

What is the sum of the first 17 terms of an arithmetic progression if the first term is -20 and last term is 28?

Find the 15<sup>th</sup> term of the sequence 20, 15, 10 . . . . .

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

The first term of an Arithmetic Progression is 22 and the last term is -11. If the sum is 66, the number of terms in the…

The 7<sup>th</sup> and 12<sup>th</sup> term of an arithmetic progression are -15 and 5 respectiv…

The 4<sup>th</sup> and 7<sup>th</sup> term of an arithmetic progression are 11 and -4 respective…

If S<sub>n</sub> denote the sum of n terms of an A.P. with first term a and common difference d such that $$…