Question

Which sequences are geometric? Check all that apply.

–2, –4, –6, –8, –10, …

16, –8, 4, –2, 1

–15, –18, –21.6, –25.92, –31.104, …

4, 10.5, 17, 23.5, 30, …

625, 125, 25, 5, 1, …

Answer 1

Pretty much what intrinix said, except that a geometric sequence is \(k, kx, kx^2, kx^3,\) etc where x is something called the common ratio, which can be any number except 0.

Answer 2

Crap I deleted it

x.x

Answer 3

Time to rewrite it

Answer 4

A geometric sequence goes by
\(a,ax,ax^2,ax^3,ax^4,ax^5,ax^6,\)etc

So for example
\(2,2(3),2(3)^2, 2(3)^3, 2(3)^4,2(3)^5,\) etc

Which would give you something like
\(2,6, 18, 54, 162, 486,\) etc

Answer 5

Agreed

Answer 6

Thank you very much yall

Answer 7

No problem ^^