webwork 7

①
off
5

days
o
-



+
by
-


+




't "
C, er t Ger r L ra
y
=

,




7kt 5x tf =D



(x -13 ) ( at 2)


y = -
3 -

2
,




r
,
= -
3 rz = -
2




②
9,2¥ 4a¥ tag o
-

-
-




BX )
"
(x) ea (C, cos Bx +
Cz sin
y
=
-




find a and B ,
B > 0




( D
'
-

4D t 9) y =
O




f ( D ) =D



FLD ) =
DZ -

4 D -19



f (m) =
o




Z
M
-
Lim t 9 =
O




-
41=42-41932
=
m




m
=
4 I 255 i
-


2



m
=
2 tf i


4 =
2 B =
Fs

, ③ 16 y
' '
t 56 y
'
+49
y
=
O



O) 4
yl
'
co ) 2
y
=
=




(4 rt 7) 2=0


4 r t 7 =
0

4r =
-



7

r =
-

7

I

-744 -

7-44
Lt )
'

=
c e +
ate
y ,



"" ""
" 4
7Th
-


-




est
'

Cre
Lt ) c, e
z
t
y Z
=
e
-
-




, ,




e°
°


( o) =
C,
+
c e co ) =
4
y

C ,
= 4


'
lo ) e° Geo Czecho )
GI
c, t
Z
-




y
= -




,




7
C t
Cz 2
-




=
-



,
-




4


-
7 t Cz =
z


Cz = 9



-744 -

7-44
gits
-
4 e +9 -
Le