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anonymous

  • one year ago

6 13 38 ? 532 2675

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  1. dan815
    • one year ago
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    |dw:1435053690269:dw|

  2. dan815
    • one year ago
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    |dw:1435054001940:dw|

  3. dan815
    • one year ago
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    kind of like a brute force method

  4. dan815
    • one year ago
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    |dw:1435054432140:dw|

  5. dan815
    • one year ago
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    or u can write out the diferences and see if you can find a solution to x, such that all the differences are equal, and if the that solves the terms u want

  6. ganeshie8
    • one year ago
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    does this recurrence relation work\[a_0 = 6,\\~\\a_{n}=(a_{n-1}+8-n)*n\]

  7. dan815
    • one year ago
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    ya that works -.- how did u see that

  8. dan815
    • one year ago
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    wait no it doesnt

  9. dan815
    • one year ago
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    thaat works though

  10. welshfella
    • one year ago
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    no it doesen't

  11. dan815
    • one year ago
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    u prolly typoed but.. how did u find it?

  12. ganeshie8
    • one year ago
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    oh which term is it failing ?

  13. dan815
    • one year ago
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    the brackets were wrong thats all

  14. welshfella
    • one year ago
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    is it correct for second term?

  15. dan815
    • one year ago
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    oh wait no its fine actually nothing is wrong

  16. welshfella
    • one year ago
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    6 + (8-2)*2

  17. dan815
    • one year ago
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    |dw:1435055099574:dw|

  18. ganeshie8
    • one year ago
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    Ahh that looks much better than the recurrence relation @welshfella index starts with 0 :)

  19. welshfella
    • one year ago
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    oh - right - i see

  20. ganeshie8
    • one year ago
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    |dw:1435055237602:dw|

  21. dan815
    • one year ago
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    right

  22. dan815
    • one year ago
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    is ther closed form for this recurrence

  23. ganeshie8
    • one year ago
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    yes but you don't wanto see it

  24. ganeshie8
    • one year ago
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    \[a(n) = -e n^2 \Gamma(n, 1)+6 \Gamma(n+1)+7 e n \Gamma(n, 1)+e n \Gamma(n+1, 1)-e \Gamma(n+1, 1)+1 \]

  25. ganeshie8
    • one year ago
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    http://www.wolframalpha.com/input/?i=solve+a%280%29%3D6%2C+a%28n%29%3D%28a%28n-1%29%2B8-n%29*n

  26. dan815
    • one year ago
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    haha whaat

  27. welshfella
    • one year ago
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    wow!

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