# Thread: first 4 terms of sequence help

1. ## first 4 terms of sequence help

Hello, I am currently working on my degree in IT and I am stuck on sequence arithmetic. The question asks me to find the first 4 terms of the sequence. an=(-7)n+1
If anyone can help I have been banging me head on this for an hour, if someone has some examples that could help me figure this out I would be extremely grateful,

-Tony

2. ## Re: first 4 terms of sequence help

Originally Posted by owninginc
Hello, I am currently working on my degree in IT and I am stuck on sequence arithmetic. The question asks me to find the first 4 terms of the sequence. an=(-7)n+1
If anyone can help I have been banging me head on this for an hour, if someone has some examples that could help me figure this out I would be extremely grateful,

-Tony
Just pick an "n"
$\displaystyle n = 0 \implies a_0 = (-7)^{0 + 1} = (-7)^1 = -7$

$\displaystyle n = 1 \implies a_1 = (-7)^{1 + 1} = (-7)^2 = 49$

etc.

-Dan

3. ## Re: first 4 terms of sequence help

Originally Posted by owninginc
Hello, I am currently working on my degree in IT and I am stuck on sequence arithmetic. The question asks me to find the first 4 terms of the sequence. an=(-7)n+1
$a_1=7^2,~a_2=-7^3,~a_3=~?,~\&~a_4=~?$