ii. Prove the second translation theorem (in time): If F(s) = L(f(t)), then L(ua(t)f(t – a)) = e-a® F(s) (a > 0).

College Algebra
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ISBN:9781337282291
Author:Ron Larson
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Chapter5: Exponential And Logarithmic Functions
Section5.1: Exponential Functions And Their Graphs
Problem 7ECP: Sketch the graph of fx=5e0.17x.
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Part ii)

5. Let e be a positive number and consider the function f.(x) defined by
if 0 <x< €
f.(x)=-
%3D
if x > €.
The graph of this function is shown in Figure 65. It is clear that for
every e > 0 we have Jo f.(x)dx = 1. Show that
1-e-pe
L[f.(x)] =-
pe
and
lim L[f.(x)]=1.
Strictly speaking, lim0 f.(x) does not exist as a function, so
L[lim.0 f.(x)]is not defined; but if we throw caution to the winds, then
8(x) = lim f.(x)
1/ɛ
FIGURE 65
Transcribed Image Text:5. Let e be a positive number and consider the function f.(x) defined by if 0 <x< € f.(x)=- %3D if x > €. The graph of this function is shown in Figure 65. It is clear that for every e > 0 we have Jo f.(x)dx = 1. Show that 1-e-pe L[f.(x)] =- pe and lim L[f.(x)]=1. Strictly speaking, lim0 f.(x) does not exist as a function, so L[lim.0 f.(x)]is not defined; but if we throw caution to the winds, then 8(x) = lim f.(x) 1/ɛ FIGURE 65
ii. Prove the second translation theorem (in time): If F(s) = L(f (t)), then
L(ua(t)f(t – a)) = e_a$ F(s) (a > 0).
-as
Transcribed Image Text:ii. Prove the second translation theorem (in time): If F(s) = L(f (t)), then L(ua(t)f(t – a)) = e_a$ F(s) (a > 0). -as
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