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avatar+393 

The rule an=−2⋅3 n-1 is the explicit rule for a geometric sequence.

Which equation represents the recursive rule for this sequence?

 

an=3⋅an+1 , a1=−2

an=−2⋅an−1 , a1=−2

an=−2⋅3⋅ an−1 , a1=−2

an=3⋅an-1 , a1=−2

 Jan 8, 2019
 #1
avatar+94526 
+2

Let's list the first few terms

 

- 2, - 6, - 18, -54

 

Note that each succesive term is just 3 times the previous.....so....

 

The recursive rule is

 

an =  3* an-1, a1 = -2

 

 

cool cool cool

 Jan 8, 2019

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