anonymous
  • anonymous
help?!?!?!?! find the variables not given a1 = 10, r = 3, n = 5
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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jim_thompson5910
  • jim_thompson5910
This looks like a geometric sequence
anonymous
  • anonymous
it is
jim_thompson5910
  • jim_thompson5910
an = a1*r^(n-1) is the general formula

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jim_thompson5910
  • jim_thompson5910
In this case, a1 = 10 and r = 3, so an = 10*3^(n-1)
jim_thompson5910
  • jim_thompson5910
the nth term, an, in this case is the 5th term since n = 5 so a5 = 10*3^(5-1)
jim_thompson5910
  • jim_thompson5910
or an = 10*3^(5-1) when n = 5
anonymous
  • anonymous
High school math or what?
anonymous
  • anonymous
so,|dw:1343971838905:dw|
jim_thompson5910
  • jim_thompson5910
does that make sense?
anonymous
  • anonymous
.... no
jim_thompson5910
  • jim_thompson5910
I'm assuming you want to find an right?
jim_thompson5910
  • jim_thompson5910
The term \(\Large a_{n}\)
anonymous
  • anonymous
yess its the one missing
jim_thompson5910
  • jim_thompson5910
\[\Large a_{n} = a_{1}r^{n-1}\] \[\Large a_{n} = 10*3^{n-1}\] \[\Large a_{n} = 10*3^{5-1}\] I'll let you finish
anonymous
  • anonymous
lol thanks
jim_thompson5910
  • jim_thompson5910
you're welcome, tell me what you get
anonymous
  • anonymous
810???
jim_thompson5910
  • jim_thompson5910
you are correct
anonymous
  • anonymous
lol yay!!!!!! soo i just do that when looking for then An then lol
jim_thompson5910
  • jim_thompson5910
exactly
jim_thompson5910
  • jim_thompson5910
\(\Large a_{n}\) is the nth term. So in this case, when n = 5, \(\Large a_{n}\) is the 5th term Another way to say this \(\Large a_{5}\)
anonymous
  • anonymous
lol ok

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