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hello mates I got stuck on this problem here can anyone please help me?

 Mar 2, 2020
 #1
avatar+30637 
+3

Try a1 = -10    an =  -2*an-1

 Mar 2, 2020
 #2
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Here is a slightly different version of Alan's "recursive rule":

 

a_n = 5 * (-2)^n 

 Mar 2, 2020

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