Question

Identify the following series as arithmetic, geometric, both, or neither.

3a + 3a² + 3a³ + . . . + 3a^n

Answer 1

You can see that to get the next term in the sequence, you have to multiply the previous term by \(a\).

This is true for every single term and this is the definition of a geometric series

Answer 2

each term is multiplied by a to get the next one
so theres a 'common ratio'.

Answer 3

yes its geometric

Answer 4

Thanks!