# Math Help - geometric series

1. ## geometric series

find the nth term of the geometric sequence whose initial term is 7.5 and common ration is 10.

i need some help with this one

2. Do you know what that means?
Do you know what the second term would be? The third?

3. Originally Posted by dat1611
find the nth term of the geometric sequence whose initial term is 7.5 and common ration is 10.

i need some help with this one

Hi dat1611,

Are you looking for this?

$a_n=a_1r^{n-1}$

4. ya thats what i needed