anonymous
  • anonymous
Write the explicit formula for the geometric sequence. -5, 20, 80
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Did you mean - 80? That's not a geometric sequence unless the 80 is negative.
anonymous
  • anonymous
yes
anonymous
  • anonymous
can you help me?

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anonymous
  • anonymous
I have an answer, but I'm \not sure how \to explain how I got it.LOL
anonymous
  • anonymous
\[a _{n}=-5\times(-4)^{(n-1)}\]
anonymous
  • anonymous
Plug in n=1 and you get -5, plug in n=2 and you get 20, plug in ....etc
anonymous
  • anonymous
i understand now how to do it now thanks

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