: t= 1c, .
(), ().
:
1. .
t:
,
.
.
,
.
(9; -4). (.9).
, t= 1
,
.
(12; -1,4).
t= 0
,
.
|
(15; - 4).
0 , , .
0 t = 0 c , t =1 ( ) (. .9).
2. t.
,
.
.
t =1
/.
< 0, 0 , , (.10).
.
.
t =1
/
|
>0, 0 , , (.10).
( ) , τ (.10). , (. .10), ( ):
/.
3. t.
,
.
.
t =1
/2.
<0, 0 , , (.11).
|
|
.
t = 1
/2.
|
<0, 0 , , (.11).
( ) (.11). , , ( ):
/2.
t,
/2.
> 0, ( ), (.12).
t,
/2.
, (.12).
(.12), .
|
c ()
.