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anonymous

  • one year ago

A recursive function is shown below: f(1) = 4 and f(n) = f(n - 1) - 8; n > 1 Which of the following lists the terms in the sequence defined by this recursive function? 4, -4, -12, -20, -28, ... 4, 4, 12, 20, 28, ... 4, 12, 20, 28, 36, ... 4, -12, -20, -28, -36, ...

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  1. anonymous
    • one year ago
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    @jim_thompson5910 Can you help me again?

  2. jim_thompson5910
    • one year ago
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    are you familiar with the notation f(n) = f(n - 1) - 8 ?

  3. anonymous
    • one year ago
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    no

  4. jim_thompson5910
    • one year ago
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    f(n) is the nth term f(n-1) is the term just before the nth term

  5. anonymous
    • one year ago
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    I have my notes with me but they are no help

  6. jim_thompson5910
    • one year ago
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    saying f(n) = f(n - 1) - 8 means "nth term = (term before nth term) - 8"

  7. jim_thompson5910
    • one year ago
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    if you are given a term, you can find the next term by subtracting 8

  8. anonymous
    • one year ago
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    ok

  9. anonymous
    • one year ago
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    so you would subtract 8 from 4?

  10. jim_thompson5910
    • one year ago
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    correct

  11. anonymous
    • one year ago
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    so it would be 4,-12,...

  12. anonymous
    • one year ago
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    so then you would keep going ?

  13. jim_thompson5910
    • one year ago
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    first term is 4 second term is 4-8 = -4 third term is -4-8 = -12 etc etc notice how I'm subtracting 8 from each term

  14. anonymous
    • one year ago
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    So it would be 4,-12,-20,-28,-36...?

  15. jim_thompson5910
    • one year ago
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    yes

  16. anonymous
    • one year ago
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    thank you :D

  17. jim_thompson5910
    • one year ago
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    yw

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