Side ASide B

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+(n-1)d

Sn =

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

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

An = ar^n-1

Sn =

Sn = a(1-r^n)/1-r
OR
Sn = a(r^n-1)/r-1

S infinity =

a/1-r (for -1