I don't understand why w(x,t)= x+(1-x)t^2

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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I don't understand why w(x,t)= x+(1-x)t^2

 

 

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The given boundary value problem is,
ди
+ 2t + 3tx
dx2
(1)
%|
dt
Consider the equation,
u (x, t) = v (x, t)+ y (x, t).
(2)
By using the formula,
у (х, ) %3D и (0, г) +lu (1, 1) — и (0, 0)]
In the given boundary value problem L = 1
At given boundary conditions u (0, t) = t² , u (1, t) = 1 and u (x, 0) = x² ,
y (x, t) = x + (1 – x) t² .
Substitute y (x, t) = x + (1 – x) t² in equation (2),
u (x, t) = v (x, t) + x + (1 – x) t² .
(4)
Partially differentiate both sides of the equation (4) with respect to t,
ди
+ 2(1 – x) t
dt
dt
Substitute u
dt
dv
+ 2 (1 – x) t and
dx2
in equation (1),
dt
dx2
+ 5tx
dv
dt
(5)
dx2
When 1
a², a > 0
Consider the equation,
v (x, t) = X (x).
(6)
X GET 10 FREE QUESTIONS (6),
X"
= -1
II
Transcribed Image Text:2:48 PM Sat Apr 17 * 7% I AA bartleby.com X b In Problems 13-16 proceed as in Example 2 to solve the... f Facebook = bartleby Q Search for textbooks, step-by-step explanatio... E Ask an Expert Math / Bundle: Differential Equations with Boundary-Value P... | In Problems 13-16 proceed as in Example 2 to solve the giv... i In Problems 13-16 proceed as in Example 2 to solve the given boundary-value proble... Get live help whenever you need from online tutors! Try bartleby tutor today > The given boundary value problem is, ди + 2t + 3tx dx2 (1) %| dt Consider the equation, u (x, t) = v (x, t)+ y (x, t). (2) By using the formula, у (х, ) %3D и (0, г) +lu (1, 1) — и (0, 0)] In the given boundary value problem L = 1 At given boundary conditions u (0, t) = t² , u (1, t) = 1 and u (x, 0) = x² , y (x, t) = x + (1 – x) t² . Substitute y (x, t) = x + (1 – x) t² in equation (2), u (x, t) = v (x, t) + x + (1 – x) t² . (4) Partially differentiate both sides of the equation (4) with respect to t, ди + 2(1 – x) t dt dt Substitute u dt dv + 2 (1 – x) t and dx2 in equation (1), dt dx2 + 5tx dv dt (5) dx2 When 1 a², a > 0 Consider the equation, v (x, t) = X (x). (6) X GET 10 FREE QUESTIONS (6), X" = -1 II
2:47 PM Sat Apr 17
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X b In Problems 13-16 proceed as in Example 2 to solve the...
f Facebook
= bartleby
Q Search for textbooks, step-by-step explanatio...
E Ask an Expert
Math / Bundle: Differential Equations with Boundary-Value P... | In Problems 13-16 proceed as in Example 2 to solve the giv...
i In Problems 13-16 proceed as in Example 2 to solve the given boundary-value proble...
Get live help whenever you need from online tutors! Try bartleby tutor today →
DIFFERENTIAL
EQUATIONS with
Problems
Bundle: Differential Equations wit..
9th Edition
Dennis G. Zill
Publisher: Cengage Learning
DENNIS G. ZILA
Find 2
ISBN: 9781337604901
Chapter 12.6, Problem 14E
Textbook Problem
In Problems 13-16 proceed as in Example 2 to solve the given boundary-value problem.
ди
14.
+ 2t + 3tx
0 < x< 1, t> 0
dx2
u(0, t) = 2, u(1, t) = 1, t> 0
%3D
u(x, 0) = x², 0 < x<1
Expert Solution
To determine
The solution of the boundary value problem under given boundary conditions.
X GET 10 FREE QUESTIONS
Transcribed Image Text:2:47 PM Sat Apr 17 * 8% I AA bartleby.com + X b In Problems 13-16 proceed as in Example 2 to solve the... f Facebook = bartleby Q Search for textbooks, step-by-step explanatio... E Ask an Expert Math / Bundle: Differential Equations with Boundary-Value P... | In Problems 13-16 proceed as in Example 2 to solve the giv... i In Problems 13-16 proceed as in Example 2 to solve the given boundary-value proble... Get live help whenever you need from online tutors! Try bartleby tutor today → DIFFERENTIAL EQUATIONS with Problems Bundle: Differential Equations wit.. 9th Edition Dennis G. Zill Publisher: Cengage Learning DENNIS G. ZILA Find 2 ISBN: 9781337604901 Chapter 12.6, Problem 14E Textbook Problem In Problems 13-16 proceed as in Example 2 to solve the given boundary-value problem. ди 14. + 2t + 3tx 0 < x< 1, t> 0 dx2 u(0, t) = 2, u(1, t) = 1, t> 0 %3D u(x, 0) = x², 0 < x<1 Expert Solution To determine The solution of the boundary value problem under given boundary conditions. X GET 10 FREE QUESTIONS
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