Register to reply

Arithmetic progression homework

by Michael_Light
Tags: progression
Share this thread:
Michael_Light
#1
Mar2-11, 10:52 PM
P: 117
1. The problem statement, all variables and given/known data

Need help with number (9).. Click image for larger version

Name:	DSC00560.jpg
Views:	16
Size:	90.7 KB
ID:	32752

2. Relevant equations



3. The attempt at a solution

Can anyone give me some hints? Thanks.
Phys.Org News Partner Science news on Phys.org
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
tiny-tim
#2
Mar3-11, 04:36 AM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,148
Think. Subtract.
Suk-Sci
#3
Mar19-11, 11:56 PM
P: 44
Sn=3n2 + 4n
Hint:
S1=3+4=7
S2=12+8=20


Register to reply

Related Discussions
Finding the nth term Precalculus Mathematics Homework 1
Arithmetic progression used to determine geometric progression Precalculus Mathematics Homework 3
Finding x in a geometric progression, given the sum. Precalculus Mathematics Homework 4
Finding the nth term,,.. .. Calculus & Beyond Homework 20
Geometric progression, is this correct? ratio/first/next term Calculus & Beyond Homework 4