In an AP of 50 terms, the sum of first 10 terms is 210 and the sum of its last 15 terms is 2565. Find the A.P.
Let a be the first term and d be the common difference of the given A.P
We know that sum of first n terms of an A.P is given by,
so, the AP is a, a+d, a+2d, a+3d, .........
so the required AP is, 3, 7, 11, 15, .......
We know that sum of first n terms of an A.P is given by,
so, the AP is a, a+d, a+2d, a+3d, .........
so the required AP is, 3, 7, 11, 15, .......