Ask Question
8 February, 01:14

Which answer is the explicit rule for the sequence 11, 8.5, 6, 3.5, 1 ... ?

an=13.5+2.5n

an=13+2.5n

an=13.5-2.5n

an=13-1.5n

+1
Answers (2)
  1. 8 February, 01:36
    0
    an=13.5-2.5n

    Step-by-step explanation:

    To find the common difference

    Take the end term and subtract the first term

    8.5 - 11 = - 2.5

    Take the third term and subtract the 3rd term to verify

    6-8.5 = - 2.5 check

    The formula for an arithmetic sequence is

    an = a1+d (n-1)

    an = 11 - 2.5 (n-1)

    Distribute

    an = 11 - 2.5n+2.5

    Combine terms

    an = 13.5 - 2.5n
  2. 8 February, 01:38
    0
    Answer:13-1.5n
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Which answer is the explicit rule for the sequence 11, 8.5, 6, 3.5, 1 ... ? an=13.5+2.5n an=13+2.5n an=13.5-2.5n an=13-1.5n ...” 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