F {u (x, 0)} = F {e*} So, the above equation is expressed as, U (a, 0) = /ñe¯.
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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I don't understand why u(a,0)=sqrt(pi)*e^a^2/4. Can you please explain it to me.

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-ka U (a, t) =
dU
dt
Therefore, the equation is,
dU
+ ka? U (a, t) = 0
dt
The particular solution of the above equation,
U (a, t) = ce¬ka²i.
(2)
At the given boundary condition and use the given identity,
F {u (x, 0)} = F {ex*}
So, the above equation is expressed as,
U (α, 0)
Vñe .
(3)
Substitute t =
O in equation (2),
U α, 0)
(4)
= C.
Equate the equations (3) and (4),
c = Vãe?
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