Question

Write the nth term of the following sequence in terms of the first term of the sequence.

10, 20, 40, . . .

I'm almost positive this series is geometric because there is no solid difference.

Is there a certain formula to obtaining the general term or does it vary for each one?

Thanks y'all (:

Answer 1

first tell which series

Answer 2

isn't it geometric?

Answer 3

because there is no difference of like adding

Answer 4

ohh i meant common ratio

Answer 5

Like, 10/20=1/2 & 20/40=1/2 ?

Answer 6

nope..... do