Ask Question
24 July, 04:59

Find the sum of a finite arithmetic sequence from n = 1 to n = 13, using the expression 3n + 3.

+3
Answers (2)
  1. 24 July, 05:18
    0
    Sum of n terms = (n/2) [2a1 + (n-1) d]

    Here, a1 = 3 (1) + 3 = 6, n = 13 and d = second term - first term 9-6 = 3

    so sum of 13 term = 6.5 (12 + 12*3) = 312, - - - Answer
  2. 24 July, 05:25
    0
    The sum of an arithmetic sequence is the average of the first and last terms time the number of terms ...

    So the first term is 3+3 and the last term is 3 (13) + 3

    So the sum is:

    13 (6+42) / 2

    312
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Find the sum of a finite arithmetic sequence from n = 1 to n = 13, using the expression 3n + 3. ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers