The sum of the first n terms of an A.P. whose first term `pi` is zero. The sum of the next m terms is:

Find the sum of first 20 terms of an A.P. whose first term is 3 and the last term is 57.

In an A.P. of which a is the first term if the sum of the first p terms is zero then the sum of the next q terms is

In an A.P., if 1 is the first term and the sum of the are 1 first p terms is zero, then the sum of the next q terms is

In an A.P., of which a is the first term, if the sum of the first p terms is zero, show that the sum of the next q terms is (-a(p +q)q)/(p-1) .

If the sum of the first m terms of an A.P. is equal to the sum of either the next n terms or the next p terms, prove that, (m+n)((1)/(m)-(1)/(p)) = (m+p)((1)/(m) - (1)/(n))

What is the sum of first six terms of an A.P. whose first term is 3 and the sixth term is 27.

The first term of an A.P. is 'a' and sum of first p terms is zero. Show that the sum of next q terms will be (a(p+q)q)/(1-p).