Progression

Michael_Light

1. The problem statement, all variables and given/known data

Need help with number (9)..

2. Relevant equations

3. The attempt at a solution

Can anyone give me some hints? Thanks.

tiny-tim

Think. Subtract.

Suk-Sci

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

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Michael_Light	Progression Tweet 1. The problem statement, all variables and given/known data Need help with number (9).. 2. Relevant equations 3. The attempt at a solution Can anyone give me some hints? Thanks.

tiny-tim Blog Entries: 27 Recognitions: Gold Member Homework Help Science Advisor	Think. Subtract.