The main aim of this study is to exhibit some cases on the periodic character of the positive solutions of the rational difference equation aSn-g + bSn-r + cSn-s d.Sn-q+ eSn-r + fS. Sn+1 Sn-p (1) n-s b-u where a, b, c, d, e, f € (0, 0). The initial conditions S-p, S-p+1,...,S=q, S-q+1,...,S=r, S-r+1,...,S-s,...,S-s+1,...,S-1 and So are arbitrary positive real numbers such that p > q > r > s > 0.
The main aim of this study is to exhibit some cases on the periodic character of the positive solutions of the rational difference equation aSn-g + bSn-r + cSn-s d.Sn-q+ eSn-r + fS. Sn+1 Sn-p (1) n-s b-u where a, b, c, d, e, f € (0, 0). The initial conditions S-p, S-p+1,...,S=q, S-q+1,...,S=r, S-r+1,...,S-s,...,S-s+1,...,S-1 and So are arbitrary positive real numbers such that p > q > r > s > 0.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:The main aim of this study is to exhibit some cases on the periodic character of
the positive solutions of the rational difference equation
aSn-q + bSn-r + cSn-s
dSn
Sn+1 = Sn-p
(1)
+ eSn-r + fSn-s ) '
-q
where a, b, c, d, e, ƒ€ (0, 0). The initial conditions S-p, S-p+1;.-,S-q, S-q+1;..,S-r,
S-r+1,...,S-s,...,S_s+1,...,S_1 and So are arbitrary positive real numbers such that
p > q > r > s > 0.
е,

Transcribed Image Text:(d+e+ f)¢b = (a + b+c)ø?.
Case 2. Suppose the positive integers p,q,r and s are even. In this case
Sn = Sn-p = Sn-q = Sn-r = Sn-8.
From Equation (1), we have
Ø = v ( @+b+ c)½
(d+e+ f)b,
(a +b+ c)¢
(d+e+ f)¢,
Thus,
(d+ e+ f)øv½ = (a + b+ c)µ²,
(4)
and
(5)
By subtracting (4) from (5), we deduce that
(a + b+ c)(ø² – b?) = 0.
Hence, we have
(a + b+ c)(6? – ?) = 0.
If ø + y, then
((a + b+ c) = 0.
Since a, b andc are nonzero positive real numbers, thus (a+b+c) # 0. This implies
O = v. This contradicts the hypothesis o + v.
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