Why is u(x,t)=x(x)t(t). Isn't v(x,t)=x(x)t(t). Can you please explain it to me
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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Why is u(x,t)=x(x)t(t). Isn't v(x,t)=x(x)t(t). Can you please explain it to me. Thank you.
![10:47 AM Mon May 3
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Math / Bundle: Differential Equations with Boundary-Value Probl... / Solve the boundary-value problem k d 2 u d x 2 = d u ...
: Solve the boundary-value problem k a 2 u d x 2 = du dt, 0 < x < 1 , t > 0 u ( 0 ,...
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- ( + w')- = -h[v(1,t) + y (1) – uo]
x=1
The above expression will be homogeneous if -w' (1) = –hự (1) + huo.
Since the value of y (1) = y' (1) is c1 , substitute c¡ for y' (1) in equation –µ' (1) = -hự (1) + huo.
-cj =
—hсi + huo
-c1 + hc1 = huo
huo
C1 =
h-1
huo
Substitute
for c1 in equation w (x) = c1X.
h-1
huo
y (x)
h-1
dv
dt
0 <x < 1, t> 0,
v (0, t) = 0, = -hv (1, t) , h > 0, t> 0 and v (x, 0) = f (x) –
The new boundary- value problem is k-
dx²
huo
-x, 0 <x < 1.
h-1
V
dx [x=1
The equation is given below:
ди
0 < x < 1, t> 0
(1)
dx2
dt
Consider u (x, t) is X (x) T (t).
Substitute X (x) T (t) for u (x, t) in equation (1).
(X (x) T (t)) =- (X (x) T (t))
dx2
dt
kX" (x) T (t) = X (x) T' (t)
X" (х)
k-
X(x)
T'(1)
T(t)
X" (х)
Consider k-
X(x)
T'(1)
as –1.
T(t)
Therefore, the equation is reduced as follows:
X GET 10 FREE QUESTIONS
+λ=0
X(x)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fca708747-373f-4dbe-b127-10492ca0e68f%2F61668211-a85a-4b97-9712-e77a81ca310e%2Fun21np_processed.png&w=3840&q=75)
Transcribed Image Text:10:47 AM Mon May 3
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Math / Bundle: Differential Equations with Boundary-Value Probl... / Solve the boundary-value problem k d 2 u d x 2 = d u ...
: Solve the boundary-value problem k a 2 u d x 2 = du dt, 0 < x < 1 , t > 0 u ( 0 ,...
Get live help whenever you need from online tutors! Try bartleby tutor today >
- ( + w')- = -h[v(1,t) + y (1) – uo]
x=1
The above expression will be homogeneous if -w' (1) = –hự (1) + huo.
Since the value of y (1) = y' (1) is c1 , substitute c¡ for y' (1) in equation –µ' (1) = -hự (1) + huo.
-cj =
—hсi + huo
-c1 + hc1 = huo
huo
C1 =
h-1
huo
Substitute
for c1 in equation w (x) = c1X.
h-1
huo
y (x)
h-1
dv
dt
0 <x < 1, t> 0,
v (0, t) = 0, = -hv (1, t) , h > 0, t> 0 and v (x, 0) = f (x) –
The new boundary- value problem is k-
dx²
huo
-x, 0 <x < 1.
h-1
V
dx [x=1
The equation is given below:
ди
0 < x < 1, t> 0
(1)
dx2
dt
Consider u (x, t) is X (x) T (t).
Substitute X (x) T (t) for u (x, t) in equation (1).
(X (x) T (t)) =- (X (x) T (t))
dx2
dt
kX" (x) T (t) = X (x) T' (t)
X" (х)
k-
X(x)
T'(1)
T(t)
X" (х)
Consider k-
X(x)
T'(1)
as –1.
T(t)
Therefore, the equation is reduced as follows:
X GET 10 FREE QUESTIONS
+λ=0
X(x)
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