4[(b+f)-(c+r)][a (d+g)-(e+s)][(c+r)(d+g)+a(e+s)(b+f)] [((e+s) – (d+g))(a+1)] K ae ([(b+ f) – c] + 8)² – (d + g) ([(b+ f) - c] – 6)² | K 4 [a (e + s) + (d + g)]² (b+ f) (6+f)-(c+r)]-6 2[a(e+s) +(d+g)]

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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Explain the determine red

Multiplying the denominator and numerator of (23) by 4 [a (e + s) + (d +g)]
we get
x1 - Q
4[(b+f)-(c+r)][a (d+g)-(e+s)][(c+r)(d+g)+a(e+s)(b+f)]
[((e+s) – (d+g))(a+1)]
K
ae ([(b+ f) – e] + 8)² – (d + g) ([(b+ f) – e] – 6)
K
4 [a (e + s) + (d +g)l' (b+ f) (a(ets) +(d+9)]
[(b+f)-(c+r)]-8
+
K
4 [a (e + s) + (d + g)]* (c+r)
[(b+f)-(c+r)]+ô
2[a(e+s) +(d+g),
+
K
4[(b+f)-(c+r)][a (d+g)-(e+s)][(e+r)(d+g)+a(e+8)(b+f)]
((e+8) – (d+g))(a+1)]
K
la (e + s) + (d+ g)] [(b+ f) – (c+r)]²
+
K
[a (e + s) + (d+ g)] 8² + 2 [a (e + s) + (d+ g)] [(b+ f) - (c+r)] ô
K
2 (b+ f) [a (e + s) +(d+g)] ([(b+ f) – (c+r)]– 6)
K
2 (c+r) [a (e+ s) + (d + g)] ([(b+ f) - (c+r)] + 8)
K
-4[(b+ f) – (c+r)] [(c+r) (d+ g) + a (e + s) (b+ f)]
K
2 (a (e + s) – (d + g)) [(b + f) – (c + r)}²
K
2 [(c+r) + (b+ f)] [a (e + s) + (d+ g)] [(b + f) – (c + r)]
+
K
2 [a (e + s) + (d + g) [(b + f) – (c+r)] &
K
2 [a (e + s) + (d+ g)] [(b+ f) - (c+r)] ô
K
-4 [(b+ f) – (c+ r)] [(c+r) (d+g) +a(e+s) (b+ f)]
K
2 [(b+f)- (c+r)] ([a (e+ s) – (d+ g)] [(b+ f) – (c+r)])
K
2 [(b+ f)- (c+r)] ([(b+ f) + (c+r)[a (e + s) +(d+9)])
K
2 [a (e + s) + (d+ g)] [(b+ f) – (c + r)] 8
+
K
2 [a (e + s) + (d + g)] [(b + f) – (c+r)] ô
K
Transcribed Image Text:Multiplying the denominator and numerator of (23) by 4 [a (e + s) + (d +g)] we get x1 - Q 4[(b+f)-(c+r)][a (d+g)-(e+s)][(c+r)(d+g)+a(e+s)(b+f)] [((e+s) – (d+g))(a+1)] K ae ([(b+ f) – e] + 8)² – (d + g) ([(b+ f) – e] – 6) K 4 [a (e + s) + (d +g)l' (b+ f) (a(ets) +(d+9)] [(b+f)-(c+r)]-8 + K 4 [a (e + s) + (d + g)]* (c+r) [(b+f)-(c+r)]+ô 2[a(e+s) +(d+g), + K 4[(b+f)-(c+r)][a (d+g)-(e+s)][(e+r)(d+g)+a(e+8)(b+f)] ((e+8) – (d+g))(a+1)] K la (e + s) + (d+ g)] [(b+ f) – (c+r)]² + K [a (e + s) + (d+ g)] 8² + 2 [a (e + s) + (d+ g)] [(b+ f) - (c+r)] ô K 2 (b+ f) [a (e + s) +(d+g)] ([(b+ f) – (c+r)]– 6) K 2 (c+r) [a (e+ s) + (d + g)] ([(b+ f) - (c+r)] + 8) K -4[(b+ f) – (c+r)] [(c+r) (d+ g) + a (e + s) (b+ f)] K 2 (a (e + s) – (d + g)) [(b + f) – (c + r)}² K 2 [(c+r) + (b+ f)] [a (e + s) + (d+ g)] [(b + f) – (c + r)] + K 2 [a (e + s) + (d + g) [(b + f) – (c+r)] & K 2 [a (e + s) + (d+ g)] [(b+ f) - (c+r)] ô K -4 [(b+ f) – (c+ r)] [(c+r) (d+g) +a(e+s) (b+ f)] K 2 [(b+f)- (c+r)] ([a (e+ s) – (d+ g)] [(b+ f) – (c+r)]) K 2 [(b+ f)- (c+r)] ([(b+ f) + (c+r)[a (e + s) +(d+9)]) K 2 [a (e + s) + (d+ g)] [(b+ f) – (c + r)] 8 + K 2 [a (e + s) + (d + g)] [(b + f) – (c+r)] ô K
where 8 =
V[(6+ f) – (c+r)]² – 4[(6+f)-(e+r)][(c+r)(d+g)+a(e+s) (b+f)]
Now,
[(e+s) – (d+g))(a+1)]
we are going to prove that P and Q are positive solutions of prime period
two of Eq.(1). To this end, we assume that x-4 = P, x-3 = Q, _2 =
P, x-1 = Q, xo = P. Now, we are going to show that x1 = Q and x2 = P.
From Eq.(1) we deduce that
bx -1 + cx-2 + fx_3 + rx-4
(b+ f)Q+ (c+ r) P
(22
x1 = axo+
= aP+
dx -1 + ex2 + gx-3 + sx-4
(d + g) Q+ (e + s) P
Substituting (20) and (21) into (22) we deduce that
x1 – Q
(b+ f) Q+ (c+r) P
- Q
aP +
=
(d + g) Q + (e + s) P
[a (d + g) – (e + s)] PQ + a (e + s) P² – (d+ g) Q² + (b + f) Q+ (c+r) P
(d+ g) Q+ (e+ s) P
=
[a(d+g)-(e+s)|[(b+f)-(c+r)][(c+r)(d+g)+a(e+s) (6+f)]
[a(e+s)+(d+g)]²[((e+s)-(d+g))(a+1)]
+a (e + s) (6+f)-(c+r)]+6'
2(a(e+s)+(d+g)])
[(b+f)-(c+r)]–8
(d + g) (a(e+s)+(d+g)]
+ (e + s)
[(b+f)-(c+r)]+8
2[a(e+s)+(d+g)]
[(6+f)-(c+r)]-6)´+ (b+ f) (
2(a(e+s)+(d+g)]
[(b+f)-(c+r)]-ô
2(a(e+s)+(d+g)],
(d+ g)
[(b+f)-(c+r)]-8
2(a(e+s)+(d+g)]
(d + g)
+ (e + s)
[(b+f)-(c+r)]+ố
2[a(e+s)+(d+g)]
[(b+f)-(c+r)]+8°
(c+r) (ja(e+s)+(d+g)]
(d + g)
[(b+f)-(c+r)]-8
2[a(e+s)+(d+g)I
+ (e + s)
[(b+f)-(c+r)]+8
2[a(e+s)+(d+g)],
(23)
Transcribed Image Text:where 8 = V[(6+ f) – (c+r)]² – 4[(6+f)-(e+r)][(c+r)(d+g)+a(e+s) (b+f)] Now, [(e+s) – (d+g))(a+1)] we are going to prove that P and Q are positive solutions of prime period two of Eq.(1). To this end, we assume that x-4 = P, x-3 = Q, _2 = P, x-1 = Q, xo = P. Now, we are going to show that x1 = Q and x2 = P. From Eq.(1) we deduce that bx -1 + cx-2 + fx_3 + rx-4 (b+ f)Q+ (c+ r) P (22 x1 = axo+ = aP+ dx -1 + ex2 + gx-3 + sx-4 (d + g) Q+ (e + s) P Substituting (20) and (21) into (22) we deduce that x1 – Q (b+ f) Q+ (c+r) P - Q aP + = (d + g) Q + (e + s) P [a (d + g) – (e + s)] PQ + a (e + s) P² – (d+ g) Q² + (b + f) Q+ (c+r) P (d+ g) Q+ (e+ s) P = [a(d+g)-(e+s)|[(b+f)-(c+r)][(c+r)(d+g)+a(e+s) (6+f)] [a(e+s)+(d+g)]²[((e+s)-(d+g))(a+1)] +a (e + s) (6+f)-(c+r)]+6' 2(a(e+s)+(d+g)]) [(b+f)-(c+r)]–8 (d + g) (a(e+s)+(d+g)] + (e + s) [(b+f)-(c+r)]+8 2[a(e+s)+(d+g)] [(6+f)-(c+r)]-6)´+ (b+ f) ( 2(a(e+s)+(d+g)] [(b+f)-(c+r)]-ô 2(a(e+s)+(d+g)], (d+ g) [(b+f)-(c+r)]-8 2(a(e+s)+(d+g)] (d + g) + (e + s) [(b+f)-(c+r)]+ố 2[a(e+s)+(d+g)] [(b+f)-(c+r)]+8° (c+r) (ja(e+s)+(d+g)] (d + g) [(b+f)-(c+r)]-8 2[a(e+s)+(d+g)I + (e + s) [(b+f)-(c+r)]+8 2[a(e+s)+(d+g)], (23)
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