Question

PLEASE HELP MEDAL WILL BE REWARDED!!!!!!
Find an equation for the nth term of the arithmetic sequence.

-17, -13, -9, -5, ...

an = -17 + 4(n + 2)

an = -17 x 4(n - 1)

an = -17 + 4(n - 1)

an = -17 + 4(n + 1)

I think it might be the third one...

Answer 1

that's what I think too

Answer 2

common difference is 4 and the intial is -17
\[t_n=a+(n-1)d\]
\[t_n=-17+(n-1)4\]

Answer 3

Thank you @Chelsea04 :)
What about this one??

Find an equation for the nth term of the sequence.

-4, -16, -64, -256, ...

an = 4 • -4n

an = 4 • -4n + 1

an = -4 • 4n

an = -4 • 4n - 1

Answer 4

I have a feeling its the last one

Answer 5

is the n-1 in brackets?

Answer 6

No its like 4^n-1

Answer 7

oh, then yea, the last one

Answer 8

Okay thanks a lot! Im posting more questions soon if you want to earn more medals since your an amazing help!!!

Answer 9

thank you :) you're so nice :)