��.13.1 �� 9 �� (��)

�� #1

$�� 13.1. �� :1) {(x/y-y/x=5/6, x^2-y^2=5); 2) {(1/(x+1)+1/y=1/3, 1/(x+y)^2-1/y^2=1/4);3) {((x+y)^4+4(x+y)^2=117, x-y=25);4)...$

�� , �� 9 ��, ��-��:

13.1. �� :

1) {(x/y-y/x=5/6, x^2-y^2=5);

2) {(1/(x+1)+1/y=1/3, 1/(x+y)^2-1/y^2=1/4);

3) {((x+y)^4+4(x+y)^2=117, x-y=25);

4) {(v((x+y)/(5x))+v((5x)/(x+y))=34/15, x+y=12).

*�� .

(�� )

(�� )

*�� , ��