vera_ewing
  • vera_ewing
Check my answer please
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Don't think so. The common ratio is -2.
welshfella
  • welshfella
none of them are correct common ratio = -10 according to the question.
anonymous
  • anonymous
Common ratio is any term divided by the term immediately preceding it.\[\frac{ -10 }{ 5 } = -2\]

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welshfella
  • welshfella
oh sorry I misread the question The second term is -10.!!!
welshfella
  • welshfella
as ospreytriple has said the common ratio r can be found by second term / first term = -10 / 5
anonymous
  • anonymous
In general,\[a_n = a_1\left( r \right)^{n-1}\]For the first term (n=1) you would get\[a_1=a_1\left( r \right)^{1-1} = a_1\]In your question, \(a_1 = 5\) and \(r = -2\)
welshfella
  • welshfella
hint: first term is when n = 1
anonymous
  • anonymous
Well, if you think the answer is B, try n=0 and see what you get.
anonymous
  • anonymous
Correct.
welshfella
  • welshfella
its A
vera_ewing
  • vera_ewing
Thank you
anonymous
  • anonymous
You're welcome

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