1 I u?|D"d v
?=5? Is? ?
1c
P138
1? I P141 è4-2-4
a ( ) ( ) ( ),τεε ??= tttf
() () () ( )
τττ
τεε
sss
e
s
e
ss
sFe
s
t
s
t
???
?=?=∴??? 1
111
,
1
,
1
Q
21
()α
α
α
α
+
=
+
???
?
ssss
e
t
11
1
2 () ( ) ()
()
()2
3
2232
22
4
2
+?=+?
+?
?
?
te
e
ttet
tt
εδεδ
( )
2
3
2
2
13
2
22
2
4
+
?=
+
×??
?
?
s
e
e
se
s
s
3
22
111
1
s
s
ss
t
?
=???
3 () Ttt
T
tf <<= 0
1
() () ( )[] ( )
sTsT
e
Ts
e
sTsT
Ttt
T
tf
??
?=×?×???= 1
111111
'
εε
P149
11sin2t+5sin4t
6420
322025
4
5
2
2
24
23
2222
++
+++
=
+
+
+
?
ss
sss
s
s
s
2 ?e
-2t
) U
F
-2t+2
F
-2
) U
F
-2
F
-2(t-1)
) U
()
22
1
)2(
2
+
=×
+
×?∴
+?
??
s
e
e
s
etf
s
s
3 () ()
( )[ ]
() ( )
3
0
3
1
1
3
3
1
+
=??∴
+
?=
?
?
?
s
s
fssF
dt
ted
s
tetf
t
t
ε
ε ?
!
4 () () ()()
∫∫
=
+
?=
tt
xdxdxx
s
xtf
00
22
1
sin
1
sinsin ππ
π
π
π
π
π Q?
!
()
22
1
π
π
+
×?∴
ss
tf
5 () () () () () ()
22
222
0'0"
π
π
+
×?∴=???
??
s
stfsFsfsfsFstfQ
2 ? G U
) U
o 1 '