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What is the recursive rule for the sequence?

−7.4, −21.2, −35, −48.8, −62.6, ...

 

an=an+1+13.8 , where a1=−7.4

an=an+1−13.8 , where a1=−7.4

an=an−1+13.8 , where a1=−7.4

an=an−1−13.8 , where a1=−7.4

 Dec 11, 2018
edited by awsometrunt14  Dec 11, 2018
 #1
avatar+103913 
+2

Looks like the difference between terms is  -48.8 -  (-35) = -48.8 + 35 =    -13.8

 

So.......

 

an = an-1 - 13.8 , where a1 = - 7.4

 

 [ Remember that  an  is the term after an-1 ]

 

 

cool cool cool

 Dec 11, 2018
edited by CPhill  Dec 11, 2018

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