Arithmetic progression homework

Michael_Light
Messages
112
Reaction score
0

Homework Statement



Need help with number (9)..
DSC00560.jpg


Homework Equations





The Attempt at a Solution



Can anyone give me some hints? Thanks.
 
Physics news on Phys.org
Think. Subtract.
 


Sn=3n2 + 4n
Hint:
S1=3+4=7
S2=12+8=20
 

Similar threads

Find α+β+αβ: 7 "Solving for α+β+αβ in Arithmetic Progression
Replies
24
Views
3K
Triangle determined by arithmetic and geometric sequences
Replies
7
Views
2K
How to Solve Arithmetic Sequence Problems
Replies
1
Views
1K
What Is the Common Difference in This Arithmetic Progression?
Replies
3
Views
2K
Arithmetic progression used to determine geometric progression
Replies
3
Views
2K
Question about arithmetic progressions
Replies
3
Views
2K
Solving Arithmetic Progression and Combinations: Question on Number Theory
Replies
9
Views
2K
Arithmetic Progression - show that question
Replies
5
Views
2K
Arithmetic Progression: Find Common Difference with Given First Term and Ratio
Replies
3
Views
2K
Arithmetic Progression Problem
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top