The common difference of the A.P. $$\frac{1}{3},$$ $$\frac{{1 - 3b}}{3},$$  $$\frac{{1 - 6b}}{3},$$   …

The 7<sup>th</sup> and 12<sup>th</sup> term of an arithmetic progression are -15 and 5 respectiv…

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

What is the sum of the following series? -64, -66, -68, ......, -100

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

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

If the sums of n terms of two arithmetic progressions are in the ration $$\frac{{3n + 5}}{{5n + 7}},$$   then t…

The first and last term of an A.P. are a and l respectively. If S is the sum of all the terms of the A.P. and the common…