# Thread: A sequence problem... Yuck

1. ## A sequence problem... Yuck

Alright so my teacher decides to give us this problem with minimal instruction, and my book is awful.

Fiven the following sequence 8,14,20,26

Find the nth term

Find sn(phoenetically sounds S sub n )

Prove your formula works for all n

Alright so my teacher decides to give us this problem with minimal instruction, and my book is awful.

Fiven the following sequence 8,14,20,26

Find the nth term

Find sn(phoenetically sounds S sub n )

Prove your formula works for all n
$a_n=8+6n$ That looks right doesnt it?

3. So using that forumla how do i find the nth term. Or is that formula the answer to find the nth term?

What about finding S sub N (Sn)?

4. I know a rule is to not beg, but i'm really at a standstill and would like to finis the problem so I mustard out a decent grade.

5. Well im headed to bed ill check this in the morning, i hope somebody could write out the answers. Truely desperate.

Alright so my teacher decides to give us this problem with minimal instruction, and my book is awful.

Fiven the following sequence 8,14,20,26

Find the nth term
Find sn(phoenetically sounds S sub n )
Prove your formula works for all n
Well im headed to bed ill check this in the morning, i hope somebody could write out the answers. Truely desperate.
Instead of writing out answers i will nearly work out by giving hints

Find the nth term:
So $T_n = a+(n-1)d = 8+6(n-1) = 6n+2$
$S_n = \sum (6n+2) = \sum 6n+ \sum 2 = 3n(n+1) + 2n = 3n^2 +5n$