If $$\frac{1}{{x + 2}},$$  $$\frac{1}{{x + 3}},$$  $$\frac{1}{{x + 5}}$$   are in A.P. then x…

The 3<sup>rd</sup> and 6<sup>th</sup> term of an arithmetic progression are 13 and -5 respective…

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

The sum of first n odd natural numbers in

If a + 1, 2a + 1, 4a - 1 are in A.P., then the value of a is:

If the n<sup>th</sup> term of an A.P. is 2n + 1, then the sum of first n terms of the A.P. is

If 18<sup>th</sup> and 11<sup>th</sup> term of an A.P. are in the ratio 3 : 2, then its 21<su…

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