Suppose that F (t) = 0 for t< 1 and F (t) = t 2 for t > 1. If f (s) is the Laplace transform of F (t), what is e 2 f (2)? O 1 8. 1 4 O 5 4 o (E) O 1

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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Suppose that F (t) = 0 for t< 1 and F (f) = t 2 for t > 1. If f (s) is the Laplace transform of F (t),
what is e 2 f (2)?
O 1
8.
1
4
O (E)
The step function used to deal with abrupt change at specific times is defined as
a (t – c)
(0, t <
(1, t 20
Sの)
t <
a (t)
(sin t, t 20
a (t)
= 1 for allt
a (t)
'0, t <
1, t >0.
The Laplace transform of the function ekt where k > 0 is defined only for s > k because
o the function is exponential
o the function is piece-wise continuous only for s > k
the Laplace transform has finite values only for s > k
o the Laplace transform has initial values only for s > k
Transcribed Image Text:Suppose that F (t) = 0 for t< 1 and F (f) = t 2 for t > 1. If f (s) is the Laplace transform of F (t), what is e 2 f (2)? O 1 8. 1 4 O (E) The step function used to deal with abrupt change at specific times is defined as a (t – c) (0, t < (1, t 20 Sの) t < a (t) (sin t, t 20 a (t) = 1 for allt a (t) '0, t < 1, t >0. The Laplace transform of the function ekt where k > 0 is defined only for s > k because o the function is exponential o the function is piece-wise continuous only for s > k the Laplace transform has finite values only for s > k o the Laplace transform has initial values only for s > k
Find the Laplace Transform of et cosh(t)
1
1
2
2
8-2
1
2
s+2
1
1
+高
喜+嘉
2
2
s+1
1
2
2
S
8-2
O (E)
S 2t +1
-{**
if 0 <t < 1
Find the Laplace Transform off(t) = {
ift >1
O (E)
s + 3
e-8 (2s +3)
|
s + 2
(38 +2)
e
82
3 – e-8 (2s +3)
82
о (s + 2)(1— е ")
82
+
Transcribed Image Text:Find the Laplace Transform of et cosh(t) 1 1 2 2 8-2 1 2 s+2 1 1 +高 喜+嘉 2 2 s+1 1 2 2 S 8-2 O (E) S 2t +1 -{** if 0 <t < 1 Find the Laplace Transform off(t) = { ift >1 O (E) s + 3 e-8 (2s +3) | s + 2 (38 +2) e 82 3 – e-8 (2s +3) 82 о (s + 2)(1— е ") 82 +
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