Q23) The kernel of the Laplace transform of f(t),t> 0, is: d) e-s b) e-t a) e c) e-st Q24) The Integrating factor which make (3x²2y + 2xy + y³)dx + (x² + y²)dy = 0 exact, is: a) e-3x b) ex d) e³x Q25) L-1 = a) -2coshnt b) -2sinhnt c)-2cosnt d)-2sinnt -2s $2+72

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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Q23) The kernel of the Laplace transform of f(t), t > 0, is:
b) e-t
a) e
Q24) The Integrating factor which make (3x²y + 2xy + y³)dx + (x² + y²)dy = 0 exact, is:
c) e-st
d) e-s
a) e
-3x
b) ex
d) e³x
Q25) L-1
=
a) -2coshnt
b) -2sinhnt
c)-2cosnt
d) -2sinnt
-2s
S²+72
Transcribed Image Text:Q23) The kernel of the Laplace transform of f(t), t > 0, is: b) e-t a) e Q24) The Integrating factor which make (3x²y + 2xy + y³)dx + (x² + y²)dy = 0 exact, is: c) e-st d) e-s a) e -3x b) ex d) e³x Q25) L-1 = a) -2coshnt b) -2sinhnt c)-2cosnt d) -2sinnt -2s S²+72
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