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Find the 13th term of the following geometric sequence. 5, 15, 45, 135 , …

Guest Mar 9, 2017
 #1
avatar+86859 
+5

an + 1  = 3*an    and the nth term is given by:

 

5 * 3 (n - 1)   so the 13th term is    5 * 3 (13 - 1)   = 5 * 3 12  =  2,657,205 

 

 

cool cool cool

CPhill  Mar 9, 2017

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