u (x,t)= X (x) T (t) ,
:
,
.
.
,
,
, .
,
145. , , - v. t =0 - . - .
.
u (x,t) =X (x) T (t), -
() :
. ,
2 =l,
(t)
,
C , Tk (t)
,
146. , - , =0 , -
. -
, u (x,t) =X (x) T (t).
- :
-
T (t)
,
,
147. = 0
. u(x,t) - -
, u (x,t) =X (x) T (t). -
|
|
T (t),
, ,
,
,
148. =0 , .
.
, u (x,t) =X (x) T (t).
- :
-:
(t)
,
, , -
149. , x =0 =l, , u=u (x,t) , , .
150. l = 0 x=l. x=l/ 2 h t =0 . u (x,t) t >0.
151. l x= 0, , . , - h t =0 . u (x,t) t >0.