February 20th, 2012, 02:16 PM  #1 
Newbie Joined: Feb 2012 Posts: 2 Thanks: 0  Recurrence Relation
Problem from "Discrete Mathematics with Graph Theory" by Goodaire and Parmenter Page 175 # 18 an = 2an?1 + 3an?2 a0= 2 a1=1  So far I have: x²2x3=0 (x3)(x+1)=0 x={3,1} an=?3^n + ?(1)^n System of equations: ? + ? = 2 3?  ? = 1 ? =9/4 ? = 1/4 an= (1/4)(3)^n + (9/4)(1)^n an= (3/4)^n + (9/4)^n But then it doesn't check out right.. Maybe I'm not checking it right or I made a fundamental mistake. I need help!! Thanks. 
February 20th, 2012, 03:44 PM  #2 
Newbie Joined: Feb 2012 Posts: 2 Thanks: 0  Re: Recurrence Relation
Never mind!


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