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anonymous

  • one year ago

MEDAL AND FAN!!! PLEASE HELP!!! Generate the first 5 terms of this sequence: f(1) = 2 and f(2) = 3, f(n) = f(n - 1) + f(n - 2), for n > 2. A) 2, 3, 5, 7, 9 B) 2, 3, 4, 7, 11 C) 2, 3, 5, 9, 11 D) 2, 3, 5, 8, 13

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  1. anonymous
    • one year ago
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    Please help me, I am so lost!

  2. starwars18
    • one year ago
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    This problem looks like it has mistakes

  3. starwars18
    • one year ago
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    are you sure its f(n MINUS 1, 2 and so on?)

  4. anonymous
    • one year ago
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    That may be true. This course makes mistakes sometimes, it's really annoying.

  5. alekos
    • one year ago
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    no its fine. using the formula f(3) = f(2) + f(1)

  6. alekos
    • one year ago
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    do the same for f(4) and f(5)

  7. anonymous
    • one year ago
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    And yes, I double-checked. This is what it says.

  8. starwars18
    • one year ago
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    Alekos is right

  9. anonymous
    • one year ago
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    So f(3) = 5?

  10. starwars18
    • one year ago
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    Yes

  11. alekos
    • one year ago
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    now do the same for f(4) and f(5)

  12. anonymous
    • one year ago
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    And f(4) = 9 ?

  13. starwars18
    • one year ago
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    what is f(3) + f(2)?

  14. starwars18
    • one year ago
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    you only use the last two f(n)'s

  15. alekos
    • one year ago
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    no. f(4) = f(4-1) + f(4-2)

  16. anonymous
    • one year ago
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    Oh, so f(4) = 8 ?

  17. alekos
    • one year ago
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    yep

  18. alekos
    • one year ago
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    now do f(5)

  19. anonymous
    • one year ago
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    So it's D ?

  20. starwars18
    • one year ago
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    Yes, do you understand?

  21. alekos
    • one year ago
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    yeah you got it

  22. anonymous
    • one year ago
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    Yes, thank you! I can only give one medal, but I'll fan both of you!

  23. starwars18
    • one year ago
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    alekos deserves it

  24. starwars18
    • one year ago
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    hes the one that figured out that formula

  25. alekos
    • one year ago
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    np

  26. starwars18
    • one year ago
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    have a great day

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