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

A square is drawn by joining the mid points of the sides of a given square in the same way and this process continues in…

If S<sub>n</sub> denote the sum of the first n terms of an A.P. If S<sub>2n</sub> = 3S<sub&gt…

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

Two A.P.’s have the same common difference. The first term of one of these is 8 and that of the other is 3. The di…

If 18<sup>th</sup> and 11<sup>th</sup> term of an A.P. are in the ratio 3 : 2, then its 21<su…

For A.P. T<sub>18</sub> - T<sub>8</sub> = ........ ?

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