Ask Question
24 August, 09:41

Find the 14th term of the geometric sequence 10,-20,40, ...

+4
Answers (2)
  1. 24 August, 09:58
    0
    The sequence is multiplying by - 2, so

    x = 10 * (-2) ^n

    x = 10 * (-2) ^14

    x = 10 * 16 384

    x = 163 840
  2. 24 August, 11:37
    0
    Obviously each term is multiplied by - 2

    an=a1 times r^ (n-1)

    a1=first term

    r=common ratio

    r=-2

    a1=10

    an=10 times (-2) ^ (n-1)

    n=14=14th term

    a14=10 times (-2) ^ (14-1)

    a14=10 times (-2) ^13

    a14=10 times - 8192

    a14=-81920

    it is - 81920
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Find the 14th term of the geometric sequence 10,-20,40, ... ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers