- #1
hostergaard
- 37
- 0
Homework Statement
http://img16.imageshack.us/img16/2327/nummer1.jpg
Homework Equations
Sn=(u1(rn-1))/(r-1)
The Attempt at a Solution
I think i need to use the equation for geometric series(above). Or do i use the arithmetic furmula since ln(a/b)=ln(a)-ln(b). I think i am a bit confused...
Last edited by a moderator: