Ask Question
6 November, 20:21

Which one is a rule for the nth term of an arithmetic sequence with a8 = 56 and d = 5?

A. an = 16 - 5n

B. an = 26 + 5n

C. an = 26 - 5n

D. an = 16 + 5n

+2
Answers (1)
  1. 6 November, 20:42
    0
    An for arithmetic sequence, an = a + (n - 1) d

    a8 = a + (8 - 1) x 5 = a + 7 x 5 = a + 35 = 56

    a = 56 - 35 = 21

    Therefore, an = 21 + (n - 1) x 5 = 21 + 5n - 5 = 16 + 5n

    an = 16 + 5n
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Which one is a rule for the nth term of an arithmetic sequence with a8 = 56 and d = 5? A. an = 16 - 5n B. an = 26 + 5n C. an = 26 - 5n D. ...” 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