Question

What are the explicit equation and domain for a geometric sequence with a first term of 4 and a second term of -8? (5 points)

an = 4(-2)n - 1; all integers where n ≥ 0

an = 4(-2)n - 1; all integers where n ≥ 1

an = 4(-12)n - 1; all integers where n ≥ 1

an = 4(-12)n - 1; all integers where n ≥ 0

Answer 1

PLEASE SOME ONE HELP

Answer 2

HI!!

Answer 3

hi!

Answer 4

do you mind helping me with this

Answer 5

i believe that the answer is the third one but im not sure

Answer 6

\[a,ar,ar^2,ar^3...\] \[4,4\times r=-8\]

Answer 7

if
\[4\times r=-8\] then \[r=\frac{-8}{4}=-2\]

Answer 8

okay

Answer 9

therefore
\[a_n=4\times (-2)^{n-1}\]

Answer 10

so is it a or b???

Answer 11

it would be B

Answer 12

okay thank you

Answer 13

because \(n\geq 1\) is what they want as the domain

Answer 14

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