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14 Cards in this Set

  • Front
  • Back
arithmetic sequence
linear
d=
common difference of change
now-next
next=now+d
recursive
Un=u(n-1)+d
function
an=nd+b
sum of arithmetic series
Sn=S=(a0+an)(n)
2
a0=
initial term
value @ stage n
n+1=
final term
(total # of stages)
geometric sequence
exponential change (increases by common ratio)
r=
common ratio
Now-next
Next=rnow
recursive
rU(n-1), starts at U0
function
A0(r)^n
sum of geometric series
Sn=Ao(r^n+1 -1)
r-1