Theorem 5 Every solution of Eq. (1) is unbounded if a > 1. Proof: Let {rn}-4 be a solution of Eq.(1). Then from Eq.(1) we see that bxn-1 + cxn-2 + fxn-3 + ran-4 Xn+1 = axn + > axn for all n2 1. dxn-1 + exn-2+gan-3 + sxn-4 We can see that the right hand side can be written as follows

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Chapter7: Distance And Approximation
Section7.2: Norms And Distance Functions
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Theorem 5 Every solution of Eq.(1) is unbounded if a > 1.
Proof: Let {rn}-4 be a solution of Eq.(1). Then from Eq.(1) we see that
bxn-1 + cxn-2 + fxn-3 + ræn-4
Xn+1 = axn +
> axn
for all n2 1.
dxn-1 + exn-2 + gxn-3 + sxn-4
We can see that the right hand side can be written as follows
Yn+1 = ayn Yn = a"yo,
and this equation is unstable because a > 1, and
lim Yn = 00.
n-00
Then, by using the ratio test {xn}4 is unbounded from above. Thus,
the proof is now completed.
Transcribed Image Text:Theorem 5 Every solution of Eq.(1) is unbounded if a > 1. Proof: Let {rn}-4 be a solution of Eq.(1). Then from Eq.(1) we see that bxn-1 + cxn-2 + fxn-3 + ræn-4 Xn+1 = axn + > axn for all n2 1. dxn-1 + exn-2 + gxn-3 + sxn-4 We can see that the right hand side can be written as follows Yn+1 = ayn Yn = a"yo, and this equation is unstable because a > 1, and lim Yn = 00. n-00 Then, by using the ratio test {xn}4 is unbounded from above. Thus, the proof is now completed.
l stc ksa
12:14 AM
@ 9 60% G
The objective of this article is to investigate some qualitative behavior of
the solutions of the nonlinear difference equation
bxn-1 + cæn-2 + fxn-3 + ræn-4
dxn-1 + exn-2+ gxn-3 + sxn-4
Xn+1 = axn +
n = 0,1, 2, . (1)
where the coefficients a, b, c, d, e, f, g, r, s E (0, 00), while the initial con-
ditions a-4,x_3,x_2, x –1, xo are arbitrary positive real numbers. Note that
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Transcribed Image Text:l stc ksa 12:14 AM @ 9 60% G The objective of this article is to investigate some qualitative behavior of the solutions of the nonlinear difference equation bxn-1 + cæn-2 + fxn-3 + ræn-4 dxn-1 + exn-2+ gxn-3 + sxn-4 Xn+1 = axn + n = 0,1, 2, . (1) where the coefficients a, b, c, d, e, f, g, r, s E (0, 00), while the initial con- ditions a-4,x_3,x_2, x –1, xo are arbitrary positive real numbers. Note that Cancel Actual Size (399 KB) Choose
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