45 5 3 77775 . ; . § 3 <5 555 55 55555 55 5 0.0
55 = 55 > 5> > 55 555 55 5555 5
!
...33 .
&
3- p +
.
+
6
U
U3
/
x= U
2 U
2 +3
2 -3
,y = U
.,x 3 + y 3 2
3
2
3
+
U
U
-3 U 3 45 5 3 77775 . ; . § 3 << 5 . Q 3 8.8 !
...33 .
x =..33 .--55x =..33 33 CC
5555555555..000x =.33 .33 CC
.000x - x .
999x =.333
%%55x =
-)
.333
.37
=
999
...
55..33 =
&
.000x =.33 .33 CC
x =........33 CC
999x =.333
.37
...
3- p p=3.. CC ..3-p 00
%%. 3- p =-1 3 - p1 = p -3
+
.
6
+
U3
U
.
U 6 -U 3
=
U6 + U3
1 U 6 +U 3 1 1 U 6 -U 3 1
6 -U 3
=U
6 -3
6 -U 3
=U
3
/
x= U
2 +3
2 -3
,y = U
.,x 3 + y 3 U 2 -3
U 2 +3
2 +3
2 -3
2 +3 1 3+ 1U 2 -3 13
x +y = U
+U
= 1U
= 1 9 + U 2 1 +1 9 - U 2 1 =.8
U 2 -3 U 2 + 3
1 U 2 -3 1 1 U 2 + 31
2 +3
2 -3
xy = U
=.
%U
U 2 - 3 U 2 +3
N
x 3 + y 3= 1 x + y1 3-3xy =.8 3 -3 O. =333
2 U
-3 U 3 U - 3 U 3 = U 1 3 + . 1 -3 U 3 O .
= U 3 -U .
= U 3 -.