Front  Back  
log(xy)
log(x/y)

logx + logy
logx  logy


log# = nlogt + logk

# = kt^2


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

term repeated after n terms
period number :3


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

sequence 'swings' from terms
above and below :5


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

An = a+(n1)d


Sn =

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


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

An = ar^n1


Sn =

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


S infinity =

a/1r (for 1
