an is defined recursively as a, = an-1-2an-2 and ao = -1, a1 = 2. Show that if we use the reverse of the recurrence relation, i.e. A-an-1A+20,-3A², terms will cancel and this equals 1. By finding the solution to the recurrence relation, derive a closed formula for the sequence.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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1. a, is defined recursively as a, = an-1-20,,-2 and ao =-1, a1 = 2.
Show that if we use the reverse
of the recurrence relation, i.e. A-an-14+2an-24?, terms will cancel and
this equals 1. By finding the solution to the recurrence relation, derive a
closed formula for the sequence.
(NOTE: Please elaborate on the answer and explain. Please do not copy-paste the answer from
the internet or from Chegg.)
Transcribed Image Text:1. a, is defined recursively as a, = an-1-20,,-2 and ao =-1, a1 = 2. Show that if we use the reverse of the recurrence relation, i.e. A-an-14+2an-24?, terms will cancel and this equals 1. By finding the solution to the recurrence relation, derive a closed formula for the sequence. (NOTE: Please elaborate on the answer and explain. Please do not copy-paste the answer from the internet or from Chegg.)
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