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Side A  Side B  
1 
log(xy)
log(x/y)

logx + logy
logx  logy


2 
log# = nlogt + logk

# = kt^2


3 
Periodic Sequence
1, 2, 3, 1, 2, 3

term repeated after n terms
period number :3


4 
Oscillating Sequence
5, 6, 5, 4, 5, 6

sequence 'swings' from terms
above and below :5


5 
Arithmetic Sequences
e.g. 1, 4, 7, 10
An =

An = a+(n1)d


6 
Sn =

Sn = (1/2)n(2a+(n1)d)


7 
Geometric Sequences
e.g. 1, 2, 4, 8
An =

An = ar^n1


8 
Sn =

Sn = a(1r^n)/1r
OR
Sn = a(r^n1)/r1


9 
S infinity =

a/1r (for 1

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