325
16. " &__ !&
W' ! ( ! ' ) y, '
’
1
2
2
2
2
b
y
a
x
, x = 0.
/()! = 0 ', ( &
2
= -b
2
, !<, 7
< ’. ", ' < (.
W' ! ( ! ' ) , ' ’-
1
2
2
2
2
b
y
a
x
, y=0.
A! ' ) ( & = 0 , ,
'. /(9 & =0 ', (
= ± .
", ! ' ) '( ! (; 0) (-; 0);
) 9 '.
5( < ()
) '. ( , !-
(, ()< 2. B ) %<!F &%%F =%&#, ! b – *-
!F &%%F.
2. 5 W " "W !& /.
5 & ( ( . A !, 7
( ! N(; &) () ,
(-
( ! N
1
(-; &) N
2
(;- &).
'!, 7 ! N
1
! ! N ( (, ! N
2
! ! N ( '. A !, ' < ( -
, < (.
3. 5 W * /.
R7 ( ! N(; &) () ',
() ( ! K(-x;-y). A! K, !(, !
! N ( ! (. A !
, ' < .
+ ' < +! =%&#.
4. 5 W$ ~ & = kx
|k|
<
a
b
& " !. R7
| k|
a
b
t
, ! ' <.
W' ! ( ! ' & = kx, '
’