How do I find the nth term of this sequence?  TOPIC_SOLVED

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How do I find the nth term of this sequence?

Postby rogermiranda on Tue Jul 06, 2010 2:13 pm

I have the sequence 2,8,26,80,242
So b sub n = 6,18,54,162
b sub 1 = 6
r = 3
using the geometric formula I have 6 times 3^(n-1).
Now I am stuck? What are the next steps? Please help!
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Re: How do I find the nth term of this sequence?  TOPIC_SOLVED

Postby Martingale on Tue Jul 06, 2010 3:18 pm

rogermiranda wrote:I have the sequence 2,8,26,80,242
So b sub n = 6,18,54,162
b sub 1 = 6
r = 3
using the geometric formula I have 6 times 3^(n-1).
Now I am stuck? What are the next steps? Please help!


3,9,27,81,243..

=

your sequence is one less per term

so the nth term is
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Postby stapel_eliz on Tue Jul 06, 2010 3:28 pm

rogermiranda wrote:I have the sequence 2,8,26,80,242
So b sub n = 6,18,54,162

How does your "so" statement relate to the given sequence? :confused:
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