Find the solution for an = 6a-1-8an-2 for n>2 and ao = 4, aj = 10.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Find the solution for an = 6a,-1-8an-2 for n > 2 and ao = 4, a1 = 10.
Transcribed Image Text:Find the solution for an = 6a,-1-8an-2 for n > 2 and ao = 4, a1 = 10.
Expert Solution
Step 1

Given recurrence relation is an=6an-1-8an-2, n2 and a0=4, a1=10.

Let an=xn be a solution of above recurrence relation. Therefore above recurrence relation can be solved as:

                               an=6an-1-8an-2xn=6xn-1-8xn-2 , Hence  

                          xn-6xn-1+8xn-2=0xn-2x2-6x+8=0x2-6x+8=0x-2x-4=0

Therefore either x-2=0 or x-4=0. Hence either x=2 or x=4.

Therefore an=2n or an=4n.

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