Question

Find an explicit rule for the nth term of the sequence.

-3, -15, -75, -375,

Answer 1

I think it's: an = -3 • 5^n - 1

Answer 2

I'm not sure though.

Answer 3

\(\large -3 (5)^{n-1}\)

Answer 4

you're right !

Answer 5

Thanks :)

Answer 6

to be sure, just plugin n = 1 and see if u get back the first term or not

Answer 7

Alright, thanks for the help!

Answer 8

np :)