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AGummiBear55
Group Title
How do I do this problem?
n an
1 1
2 6
3 11
4 16
When n equals 8, what does an equal?
 one year ago
 one year ago
AGummiBear55 Group Title
How do I do this problem? n an 1 1 2 6 3 11 4 16 When n equals 8, what does an equal?
 one year ago
 one year ago

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wio Group TitleBest ResponseYou've already chosen the best response.2
You can tell it's an arithmetic sequence because \[ \large a_{n+1} a_n=5 \]
 one year ago

wio Group TitleBest ResponseYou've already chosen the best response.2
Arithmetic sequences have the form: \[ a_n = a_1 + (n1)d \]
 one year ago

wio Group TitleBest ResponseYou've already chosen the best response.2
In this case \(d = 5\) and \(a_1=1\), so our equation is \[ a_n = 1 + (n1)5 \]
 one year ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
But that is not the question... your formula is:\[a_n = a_1 + (n  1)d\]The \(d\) was stated by @wio: \(5\).
 one year ago

wio Group TitleBest ResponseYou've already chosen the best response.2
So you want to substitute \(n=8\) into the equation to find \(a_8\).
 one year ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
So, the formula is:\[a_n = 1 + 5(n  1)\]Now substitute \(n = 8\).
 one year ago

AGummiBear55 Group TitleBest ResponseYou've already chosen the best response.0
So the answer would be 36, correct?
 one year ago

AGummiBear55 Group TitleBest ResponseYou've already chosen the best response.0
:D Thank you both, yall were A LOT of help!! <3
 one year ago
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