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

The common difference of the A.P. $$\frac{1}{{2b}},$$ $$\frac{{1 - 6b}}{{2b}},$$  $$\frac{{1 - 12b}}{{2b}},$$ &…

If the sum of n terms of an A.P. be 3n<sup>2</sup> + n and its common difference is 6, then its first term i…

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

If $$\frac{{5 + 9 + 13 + ...\,{\text{to}}\,n\,{\text{terms}}}}{{7 + 9 + 11 + ...\,{\text{to}}\,\left( {n + 1} \right)\,{…

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

The sum of n terms of two A.P.’s are in the ratio 5n + 4 : 9n + 6. Then, the ratio of their 18<sup>th</su…

If the sum of three consecutive terms of an increasing A.P. is 51 and the product of the first and third of these terms …