Question

Please, PLEASE help with Algebra 2!

Given the geometric sequence where a1 = 2 and the common ratio is 8, what is the domain for n?

A. All integers

B. All integers where n ≥ 1

C. All integers where n ≥ 0

D. All integers where n ≥ −1

Answer 1

@amistre64 Think you could help? I have no clue what to do.

Answer 2

a sequence is a function of n; A(n) in this case it starts at n=1 and goes from there

Answer 3

so, the domain is: 1,2,3,4,5,6,....

Answer 4

so it's A

Answer 5

?

Answer 6

is -4 an integer?

Answer 7

can we use n=-4?

Answer 8

no

Answer 9

I mean yes

Answer 10

hmm, n starts at 1, and increase from there

is -4 bigger than 1?

Answer 11

the domain is: 1,2,3,4,5,6,....

so, any negative numbers are out, 0 is out .... whats that leave?

Answer 12

I knew I was correct the first time, but over thought things. But, I don't see what -4 has to do with any of this since it's not in the sequence or the answers

Answer 13

-4 is an integer .. so if the domain is the set of all integers then we would be able to have A(-4) ... which is not a valid input

Answer 14

Oh! that makes sense!

Answer 15

all integers:

..., -4, -3, -2 -1, 0, 1, 2, 3, 4, .....

that cant be the domain, since it includes integers that are not acceptable in the problem is all

Answer 16

So, it would have to be B. All integers >= 1

Answer 17

right?

Answer 18

correct

Answer 19

Awesome! Thank you so much!

Answer 20

youre welcome