In an A.P. of 99 terms, the sum of all the odd-numbered terms is 2550. Then find the sum of all the 99 terms of the A.P.

In an A.P of 99terms,the sum of all the odd- numbered terms is 2550. Then find the sum of all the 99 terms of the A.P.

In an arithmetic progression containing 99 terms, then sum of all the odd numbered terms, the sum of all the odd numbered terms is 2550. If the sum of all the 99 terms of the arithmetic progression is k, then (k)/(100) is equal to

An A.P. consists of n terms. If the sum of its first three terms is x and the sum of the last three terms is y, then show that, the sum of all the terms of the A.P. is (n)/(6)(x+y) .

If the sum of the first four terms of an AP is 40 and the sum of the first fourteen terms of an AP is 280. Find the sum of first n terms of the A.P.

The sum of the first p terms of an A.P. is q and the sum of the first q terms of the same A.P. is p. Find the sum of the first (p+q) terms of the A.P.

The twelfth term of an A.P. is (-13) and the sum of its first four terms is 24, find the sum of first 10 terms of the A.P.

The twelfth term of an A.P. is (-13) and the sum of its first four terms is 24, find the sum of first 12 terms of the A.P.

An A.P. consists of 31 terms. If its 16th terms is m, then the sum of all the terms of this A.P. is

An A.P. consists of 31 terms. If its 16th terms is m, then the sum of all the terms of this A.P. is