The sum of first n odd natural numbers in

What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?

If S<sub>1</sub> is the sum of an arithmetic progression of ‘n’ odd number of terms and S<sub…

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

The common difference of the A.P. is $$\frac{1}{{2q}},$$ $$\frac{{1 - 2q}}{{2q}},$$  $$\frac{{1 - 4q}}{{2q}},$$…

After striking the floor, a rubber ball rebounds to 4/5<sup>th</sup> of the height from which it has fallen.…

If the first term of an A.P. is a and nth term is b, then its common difference is

(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n - 1 times) = ......