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anonymous

  • one year ago

FAN AND MEDAL!!!!! PLEASE HELP!!!!! The following function defines a recursive sequence: f(0) = -4 f(1) = 12 f(n) = -3•f(n -1) - 2•f(n - 2); for n > 1 Which of the following sequences is defined by this recursive function? A) -4, 12, -28, 60, … B) -4, -12, -28, -60, … C) -4, 12, -18, 54, … D) -4, 12, -18, -54, …

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  1. Pandemonium
    • one year ago
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    B

  2. anonymous
    • one year ago
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    B can't be the answer. @Pandemonium

  3. Pandemonium
    • one year ago
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    no wait let me fix this real quick

  4. anonymous
    • one year ago
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    okay

  5. Pandemonium
    • one year ago
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    i got C but id check with someone else to be sure

  6. anonymous
    • one year ago
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    Please explain how you got the answer

  7. anonymous
    • one year ago
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    So did you just guess?

  8. Pandemonium
    • one year ago
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    No my teacher is here helping me and even he's confused what the question is asking but he's trying different methods to find the answer

  9. anonymous
    • one year ago
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    okay

  10. anonymous
    • one year ago
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    It's florida virtual school, so I wouldn't be surprised if it was entirely wrong.

  11. anonymous
    • one year ago
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    @pooja195 please help

  12. Pandemonium
    • one year ago
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    yea, but me him decide to eliminate the worst possible answers and we got rid of A and B

  13. anonymous
    • one year ago
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    okay thx

  14. Pandemonium
    • one year ago
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    so your left with C and D

  15. Pandemonium
    • one year ago
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    ok, f(0) = -3 , first term = -3 f(1) = 6, 2nd term = 6 so, as of now our sequence is -3,6 to find nect term, we will use f(n) = -2•f(n -1) - f(n - 2) put n= 2 here, what do u get ?

  16. anonymous
    • one year ago
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    -2, but that must be wrong

  17. Pandemonium
    • one year ago
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    you just replace "n" by "2" there, to get f(2)

  18. Pandemonium
    • one year ago
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    f(2) = -2 f(1) - f(0) and you already know f(1) =6, f(0) = -3 just plug in values!

  19. Pandemonium
    • one year ago
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    you need to find f(3) too! f(3) = - 2f(2) - f(1) = - 2(-9) -6 = 18-6 = 12

  20. anonymous
    • one year ago
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    That's what I did. Idk how I got such a bogus answer. What did you get?

  21. Pandemonium
    • one year ago
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    Well A isnt matching and B isnt either

  22. anonymous
    • one year ago
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    Can you do it for f(4)? I'd probably get it wrong

  23. Pandemonium
    • one year ago
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    no that'll probably mess it up but u can try and see if u find a good answer

  24. anonymous
    • one year ago
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    okay

  25. Pandemonium
    • one year ago
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    ok

  26. anonymous
    • one year ago
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    I got -13, but it's obviously wrong

  27. Pandemonium
    • one year ago
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    yea, well my best possible answer would have to be D

  28. anonymous
    • one year ago
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    really, why?

  29. Pandemonium
    • one year ago
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    its the only one close to matching what me and my teacher got but to sure try to find other possible solutions

  30. anonymous
    • one year ago
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    ok

  31. Pandemonium
    • one year ago
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    so yea its either gonna be C or D

  32. Pandemonium
    • one year ago
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    my best guess would be D but i aint 100% sure

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