Find the sum of the first 25 terms of the arithmetic sequence: 7,19,31,43,...

25 th term = 7 + (25-1) 12 = 295

Sum of 25 terms = n/2 (First term +last term) = 25/2 (7+295) = (302/2) * 25 = 3775

Please let me know if you have any questions and best me if you are satisfactory.

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