Question

plz help will give medal
Which of these sequences is a geometric sequence?

1, 2, 4, 7, 11, 16, 22, …

2, 4, 8, 14, 22, 38, …

3, 6, 9, 12, 15, 18, 21, …

3, 9, 27, 81, 343, 729, …

Answer 1

for a geometric sequence \[\frac{ second~term }{ first~term }=3rd~term/2nd~term=4th~term/3rd ~term=constant\]

Answer 2

so which one is it,?

Answer 3

can u tell me?

Answer 4

i chose c but it wasnt correct lol i suck at math

Answer 5

look at the fourth one
\[9/3=27/9=81/27=343/81=...=3\]
so for this one the common ration is constant which is 3, so this is a geometric sequence

Answer 6

oh ok ok i get it :)