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sritama Group Title

11,42,93,65,57,69,..... what is the 7th number ?explain also.

  • 3 years ago
  • 3 years ago

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  1. joemath314159 Group Title
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    where do people get these sequences from?

    • 3 years ago
  2. joemath314159 Group Title
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    i cant say ive seen a sequence on this site that has made any sense in the least bit.

    • 3 years ago
  3. Ishaan94 Group Title
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    lol

    • 3 years ago
  4. Akshay_Budhkar Group Title
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    sri is it an olypiad question?

    • 3 years ago
  5. sritama Group Title
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    what is it.

    • 3 years ago
  6. sritama Group Title
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    no.akshay.

    • 3 years ago
  7. joemath314159 Group Title
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    if its a polynomal in n, then its at least a cubic >.>

    • 3 years ago
  8. joemath314159 Group Title
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    I showed last time i can make an infinite number of formulas fitting that pattern using 6 random numbers <.<

    • 3 years ago
  9. Akshay_Budhkar Group Title
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    lol1!!

    • 3 years ago
  10. sritama Group Title
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    last time??

    • 3 years ago
  11. joemath314159 Group Title
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    we get questions like these a lot. someone had posted something similar, and just like this one, we couldnt find a pattern. So using the fact that we never know how to the tail of a sequence acts, i made up a tail, and found a formula. if its correct or not, we will never know...but it does work for the first couple of numbers.

    • 3 years ago
  12. sritama Group Title
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    what is the formula?

    • 3 years ago
  13. joemath314159 Group Title
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    give me 6 numbers between -5 and 5, and not 0.

    • 3 years ago
  14. joemath314159 Group Title
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    its going to look ugly btw, but im 100% sure it works.

    • 3 years ago
  15. sritama Group Title
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    -2,-3,1,2,4,5

    • 3 years ago
  16. joemath314159 Group Title
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    k, give me a couple of mins, gotta do calculations.

    • 3 years ago
  17. joemath314159 Group Title
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    ok, the formula is: \[-\frac{3}{10}(-3)^n+\frac{5}{504}(-2)^n-\frac{335}{9}(1)^n+\frac{1107}{40}(2)^n-\frac{101}{36}(4)^n+\frac{9}{14}(5)^n\] for n = 1,2,3...,6 it equals those numbers up top. http://www.wolframalpha.com/input/?i=%E2%88%923%2F10%28%E2%88%923%29^n%2B5%2F504%28%E2%88%922%29^n%E2%88%92335%2F9%281%29^n%2B1107%2F40%282%29^n%E2%88%92101%2F36%284%29^n%2B9%2F14%285%29^n%2C+n+%3D+6 where you type in the equation, if you scroll to the right you can change the value of n to make sure it works.

    • 3 years ago
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spraguer (Moderator)
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