Find the sum of the A.P. 1, 3, 5, 7, 9, 11, 13, ........, 89
2035
2025
2015
2045
Sum of n terms is (n2)(2a+(n-1)d) = 2025
The 2nd and 50th term of an A.P is 49 and 89 respectively. Find the sum of first 51 terms of the given A.P.