Question

Please help. Pre Calc!

Find the first six terms of the sequence.

a1 = -8, an = 5 • an-1

-8, -40, -200, -1000, -5000, -25,000
-8, -40, -35, -30, -25, -20
0, 5, -40, -35, -30, -25
-40, -200, -1000, -5000, -25,000, -125,000

Answer 1

a1 = -8
that tells you the first term. so you can cross off two of your choices, because they don't start with -8

Answer 2

Okay! How do i find the next term?

Answer 3

\[a_n = 5 \cdot a_{n-1} \]
that is the rule. to find the "nth term" you multiply 5 times the (n-1)th term

in other words, to get the next term, multiply by 5
each term is 5 times the one just before it.

Answer 4

So I just multiply -5 and so on?

Answer 5

the rule has just 5 (not -5)

Answer 6

-8, -40, -200, -1000, -5000, -25,000
?

Answer 7

yes. you start with -8 (they have to give you a start)
then to get the next number, multiply by 5. you get 5*-8 = -40
then 5*-40= -200
and so on

Answer 8

Thank you!