[" 41.The sum of the first five terms and "],[" the sum of the first ten terms of "],[" an AP are same.Which one of "],[" the following is the correct "],[" statement? "]

The sum of the first 5 terms and the sum of the first 10 terms of an AP are same.Which one of the following is the correct statement? (a) The first term must be negative (b) The common difference must be negative (c) Either the first term or the common difference is negative but not both (d) Both the first term and the common difference are negative

The sum of the first ten terms of the A.P. 15,10,5,….is……

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1, then which of the following is not true?

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1 , then which of the following is not true ?

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1 , then which of the following is not true ?

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1 , then which of the following is not true ?

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1 , then which of the following is not true ?

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.