1) 9,10,11,12,13,14,15,16,17.
2)8,9,10,11,12,13,14,15,16.
3)7,8,9,10,11,12,13,14,15.
4)6,7,8,9,10,11,12,13,14
5)5,6,7,8,9,10,11,12,13.
6)4,5,6,7,8,9,10,11,12.
7)3,4,5,6,7,8,9,10,11.
8)2,3,4,5,6,7,8,9,10.
9)1,2,3,4,5,6,7,8,9.
5400
х = -------- ...................
у
2у^2–5ху х у
----------------- + --------- – ------- =
(х-2у)(х+2у) х–2у х+2у
2у^2–5ху+х(х+2у)–у(х–2у)
= --------------------------------------- =
(х–2у)(х+2у)
2у^2–5ху+х^2+2ху–ху+2у^2
= ------------------------------------------- =
(х–2у)(х+2у)
х^2–4ху+2у^2
= ----------------------
(х–2у)(х+2у)