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…

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

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

Sum of n terms of the series $$\sqrt 2 $$  $$ + $$  $$\sqrt 8 $$  $$ + $$  $$\sqrt {…

In an A.P., if d = -4, n = 7, a<sub>n</sub> = 4, then a is

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

If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are

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