anonymous
  • anonymous
11,42,93,65,57,69,..... what is the 7th number ?explain also.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
where do people get these sequences from?
anonymous
  • anonymous
i cant say ive seen a sequence on this site that has made any sense in the least bit.
anonymous
  • anonymous
lol

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Akshay_Budhkar
  • Akshay_Budhkar
sri is it an olypiad question?
anonymous
  • anonymous
what is it.
anonymous
  • anonymous
no.akshay.
anonymous
  • anonymous
if its a polynomal in n, then its at least a cubic >.>
anonymous
  • anonymous
I showed last time i can make an infinite number of formulas fitting that pattern using 6 random numbers <.<
Akshay_Budhkar
  • Akshay_Budhkar
lol1!!
anonymous
  • anonymous
last time??
anonymous
  • anonymous
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.
anonymous
  • anonymous
what is the formula?
anonymous
  • anonymous
give me 6 numbers between -5 and 5, and not 0.
anonymous
  • anonymous
its going to look ugly btw, but im 100% sure it works.
anonymous
  • anonymous
-2,-3,1,2,4,5
anonymous
  • anonymous
k, give me a couple of mins, gotta do calculations.
anonymous
  • anonymous
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.

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