Question

Write a possible explicit rule for the nth term of the sequence: 25, 15, 5, -5, -15,

Answer 1

Seems to start at 25 and decrease by 10 each step.\[a_n = 25-10n\]

Answer 2

but the 1st term is 25. So if you plug in 1 for n, it doesn't work. I'd say 25 - 10(n-1)

Answer 3

if you simplify this it is
35-10n

Answer 4

well my options are
A) an = 35 - 10n
B) an = 35(an-1) - 10
C)an = 35n - 10
D) an = 35 - 10(an-1)

Answer 5

yeah i was going w/ A

Answer 6

Thanks

Answer 7

Id say thats correct !!

Answer 8

yw