Posted by **NJ** on Wednesday, April 18, 2007 at 7:26pm.

How do I write equations for geometric sequences?

example question:

1, 3/2, 9/4, 27/8

an= a(n-1) * r^n where r is the value of dividing one term by the term before.

For instance, in the above, ao= 1,

r= a3/a2= (27/8)/(9/4)= 3/2

a1= 1*3/2

a3= 1*(3/2)^3= 27/8

Thank you, Mr. Pursley

## Answer this Question

## Related Questions

- algebra - Consider all 3-term geometric sequences with first term 1 and with ...
- Maths - Consider all 3-term geometric sequences with first term 1 and with ...
- Math - Consider all 3-term geometric sequences with first term 1 and with common...
- math - The 3rd term of a geometric progression is nine times the first term.if ...
- math - The third term of a geometric progressiom is nine times the first term.if...
- arithmetic - An arithmetic n geometric sequence have the same first term 2.with ...
- math30 - Sequences 1)A sequence has a first term of 24 and every other term is ...
- check! - If the third and ninth temr of a geometric series with a positive ...
- Maths - Eric thinks of 2 sequences.One is geometric and the other arithmetic....
- math - the 3rd term of a geometric progression is nine times the 1st term.if the...