| 1— (U4 + 2)B + uyeB?}X, =€,, 
Hi th2=—-a, 
M2 = 22, 
(1 —4)B)(1 —M2B)X, = €,, 
then 
Cal €; fu 1 
~ Q(B) (1+a,;B+a2B*) (1 — w,B)(1—2B) 
Pett eee ie Ee og eee 
= ae t 
Mi-H2 | 1-418) (1—-p2B) 
X; is a particular solution. Therefore, if the expression of Green’s function G; is 
used, 
X;= is Gj ery 
j=0 
J+1 jri 
Thus Ce ee) 
TT Ra pS pain’ 
= 21 Mit 82 M3, 
119 
t 
(5.66) 
(5.67) 
(5.66’) 
(5.68) 
(5.69) 
(5.70) 
