1/x 1/y=1/617
Giải thích
Lời giải:
\(\)\(\frac{{x + y}}{{xy}} = \frac{1}{{617}}\)
xy – 617x – 617y = 0
(x – 617)(y – 617) = 6172 = 1.6172 = 6172.1 = 617.617
+) x – 617 = 1, y – 617 = 6172, suy ra x = 618, y = 617.618
+) y – 617 = 1, x – 617 = 6172, , suy ra y = 618, x = 617.618
+) x – 617 = 617, y – 617 = 617, suy ra x = y = 1234.