anonymous
  • anonymous
HELP ME Which of the following recursive formulas represents the same geometric sequence as the formula an = 3 • 3n - 1? A. an = 9 + an - 1 B. an = 3 + an - 1 C. an = 3 • an - 1 D. an = 9 • an - 1
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous
is that an = 3*3*n-1? doesn't look like it

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anonymous
  • anonymous
its 3*3^n-1
anonymous
  • anonymous
you mean 3*3^(n-1)
anonymous
  • anonymous
yea
anonymous
  • anonymous
well, geometric series is define as a(n) = r * a(n-1), where r is the common ratio
anonymous
  • anonymous
r is 3
anonymous
  • anonymous
yes
anonymous
  • anonymous
so its either b or c
anonymous
  • anonymous
what is the first term of the sequence?
anonymous
  • anonymous
3?
anonymous
  • anonymous
actually it doesn't matter. It's B
anonymous
  • anonymous
thx
anonymous
  • anonymous
SORRY IT'S C!!

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