1. Use Theorem 7.1.1 to find ℒ{f(t)}. (Write your answer as a function of s.) f(t) = 6t5 ℒ{f(t)} =   2. Use Theorem 7.1.1 to find ℒ{f(t)}. (Write your answer as a function of s.) f(t) = et cosh t ℒ{f(t)} =   3. Use Definition 7.1.1, DEFINITION 7.1.1    Laplace Transform Let f be a function defined for  t ≥ 0.  Then the integral ℒ{f(t)} =  ∞ e−stf(t) dt   0is said to be the Laplace transform of f, provided that the integral converges. to find  ℒ{f(t)}.  (Write your answer as a function of s.) f(t) =    cos(t),      0 ≤ t < ? 0,   t ≥ ?ℒ{f(t)} =                          (s > 0)

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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1. Use Theorem 7.1.1 to find
ℒ{f(t)}. (Write your answer as a function of s.)
f(t) = 6t5
ℒ{f(t)} =
 
2. Use Theorem 7.1.1 to find
ℒ{f(t)}. (Write your answer as a function of s.)
f(t) = et cosh t
ℒ{f(t)} =
 
3. Use Definition 7.1.1,
DEFINITION 7.1.1    Laplace Transform
Let f be a function defined for 
t ≥ 0.
 Then the integral
ℒ{f(t)} = 
e−stf(t) dt
 
0
is said to be the Laplace transform of f, provided that the integral converges.
to find 
ℒ{f(t)}.
 (Write your answer as a function of s.)
f(t) = 
 
cos(t),      0 ≤ t < ?
0,   t ≥ ?
ℒ{f(t)} =                          (s > 0)
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