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

What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?

The 7<sup>th</sup> and 21<sup>st</sup> terms of an AP are 6 and -22 respectively. Find the 26&lt…

The sum of n terms of an A.P. is 3n<sup>2</sup> + 5n, then 164 is its

Given A = 2<sup>65</sup> and B = (2<sup>64</sup> + 2<sup>63</sup> + 2<sup>62&l…

The 3<sup>rd</sup> and 7<sup>th</sup> term of an arithmetic progression are -9 and 11 respective…

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

The sum of first five multiples of 3 is: