anonymous
  • anonymous
Which of the following is the formula for the geometric sequence? 3, 15, 75, 375 ... Answer an=3(5)n-1 an=5(3)n-1 an=12(3)n-1 an=5(12)n-1
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
campbell_st
  • campbell_st
well the 1st term is 3 and the common ratio is 5 so \[T_{n} = ar^{n -1}\] is the formula for a term in a geometric series... substitute a = 3 and r = 5 into the formula to find the formula.
anonymous
  • anonymous
It would be A than (:

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campbell_st
  • campbell_st
well you have all the information just substitute and trust your algebra skills.
anonymous
  • anonymous
@Shadowys is it A or B
anonymous
  • anonymous
I go with B campbell sir.
anonymous
  • anonymous
I did it on my sheet.
anonymous
  • anonymous
anonymous
  • anonymous
@nubeer can you confirm if it B
anonymous
  • anonymous
nubeer
  • nubeer
its not B option
jiteshmeghwal9
  • jiteshmeghwal9
Sorry..... No idea but go with the tips given by @CarlosGP
anonymous
  • anonymous
So I'ma go with A or C
anonymous
  • anonymous
@nubeer Mis calculation it D
nubeer
  • nubeer
still wrong.. maybe read again the guidelines told by Campbell...
campbell_st
  • campbell_st
wow @ramirokool, you don't have a lot of confidence in your skills.
anonymous
  • anonymous
@campbell_st I know the answer A but no one won't confirm it..@nubeer Show step by step please.
anonymous
  • anonymous
@nubeer show me step by step I know it A
anonymous
  • anonymous
@jiteshmeghwal9 I GOT IT A
anonymous
  • anonymous
YESSSSSSSSSSSS LORD
nubeer
  • nubeer
ya its A
nubeer
  • nubeer
and it dont have any steps.. most step you need is done just find r and subsitute it.
anonymous
  • anonymous
Sorry bout that. I see you've got it. :)

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