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The sales of homes in a new development have been increasing. In January, 8 homes were sold, in February, 12 homes were sold. In March, 16 homes were sold. This pattern continued for the remainder of the year.

What is the explicit rule that can be used to find the number of homes sold in the nth month of the year?

 

an=−4n+4

an=4n−4

an=−4n−4

an=4n+4

 

 

What is the explicit rule for the sequence?

34,26,18,10, …

 

an=42−8n

an=34n−26

an=26−8n

an=34n+42

Thanks!

Guest Apr 15, 2018
 #1
avatar+92674 
+1

First one

a1  = 4n + 4

 

Second one

First term is 34

Each successive term is -8

So we have

 

an  =  42 - 8n

 

 

cool cool cool

CPhill  Apr 15, 2018

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