The sum of the three numbers in A.P is 21 and the product of the first and third number of the sequence is 45. What are …

The first and last terms of an A.P. are 1 and 11. If the sum of its terms is 36, then the number of terms will be

If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is

What is the sum of the first 11 terms of an arithmetic progression if the 3<sup>rd</sup> term is -1 and the …

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

The 2<sup>nd</sup> and 8<sup>th</sup> term of an arithmetic progression are 17 and -1 respective…

Let S denotes the sum of n terms of an A.P. whose first term is a. If the common difference d is given by d = S<sub&g…

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