e*, when 20 = -1 %3D P„(x) sin(nrx) – nn cos(nax), when 2, = (nx)² for n = 1,2,3,.... a.) Show that Pp • Pq J. ,r)@,(x)dx = 0 %3D for p + q and compute this dot product when p = q.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Orthogonal (Perpendicular) Functions
You had seen in Problem #2 of Homework #3 that the non-zero solutions ø(x) to the ODE
p" (x) + A9(x) = 0, for 0 < x < 1, along also the BCs ø(0) + o'(0) = 0 and
Ф(1) + ф' (1) — 0, are
when
20
= -1
P»(x)
sin(плх) — пл соs (плх), when л, %3D (пл)2 for n %3D 1,2,3,....
а.)
Show that
[ 0,x)@,x)dx = o
Pp • Pg =
for p + q and compute this dot product when p = q.
b.)
Determine the coefficients A, if the function f(x)
1 is to be expanded as
A(x)
for all
0 < x < 1,
= =
n-0
where the o„(x)'s (for n = 0,1,2,3,...) are the functions above.
Transcribed Image Text:Orthogonal (Perpendicular) Functions You had seen in Problem #2 of Homework #3 that the non-zero solutions ø(x) to the ODE p" (x) + A9(x) = 0, for 0 < x < 1, along also the BCs ø(0) + o'(0) = 0 and Ф(1) + ф' (1) — 0, are when 20 = -1 P»(x) sin(плх) — пл соs (плх), when л, %3D (пл)2 for n %3D 1,2,3,.... а.) Show that [ 0,x)@,x)dx = o Pp • Pg = for p + q and compute this dot product when p = q. b.) Determine the coefficients A, if the function f(x) 1 is to be expanded as A(x) for all 0 < x < 1, = = n-0 where the o„(x)'s (for n = 0,1,2,3,...) are the functions above.
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