+0  
 
+6
249
1
avatar+371 

write a recursive rula and an explicit rule for each geometric sequence, and then find the next three terms.

2,8,32

gaburiera-chan  Mar 9, 2017
 #1
avatar+86859 
+5

Recursive rule

 

an+1  = 4 * an

 

Explicit rule

 

an   =  2 (2n - 1)

 

4th term   =  2 (2n - 1)   =   2 (2*4 - 1)   = 2 (7)   =  128    =   4 * 32

5th term  =  4 * 128 =  512

6th term = 4 * 512   =  2048

 

 

cool cool cool

CPhill  Mar 9, 2017

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