SOLUTION: the first example in a lecture of series is a^n=1/2^n can you write the recursion formula for this series? please help with this, thanks

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Question 70074: the first example in a lecture of series is a^n=1/2^n can you write the recursion formula for this series?
please help with this, thanks
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
the first example in a lecture of series is a^n=1/2^n
can you write the recursion formula for this series? 
please help with this, thanks

an+1 = +1%2F%282%5E%28n%2B1%29%29+=+1%2F%282%5En%2A2%5E1%29=%281%2F%282%5En%29%29%281%2F%282%5E1%29%29=(an)%281%2F2%29 = 

          an
an+1 =   ————         
          2                  

Edwin