SOLUTION: The first term in a geometric sequence is 1/3 and the second term is 4/3 . Which explicit formula represents this sequence?

Question 1067080: The first term in a geometric sequence is 1/3
and the second term is 4/3
. Which explicit formula represents this sequence?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The first term in a geometric sequence is 1/3
and the second term is 4/3
. Which explicit formula represents this sequence?
----
a(1) = 1/3
a(2) = a*r = 4/3
----
r = (a(2))/a(1) = (4/3)/(1/3) = 4
-------------
a(n) = (1/3)*4^(n-1)
--------
Cheers,
Stan H.
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