:
1.
2.
.
. f () j(), , .
f ()= j(), Î .
. , , .. .
f ()= j(), ( ), . , = .
. f ()= j(), F (x) = G (x), , , , .. , , .
f ()= j() F (x) = G (x) , .
:
2 1 = 0 (1)
( 2 1)(2 1) = 0 (2)
2 1 = 0 Þ ( 2 1)(2 1) = 0 .
, (1) (2), .. {1, 1} Ì {1, 1, }. , (2) (1).
, f () =j() F (x) = G (x)(**), (**) (*). (**) (*), (*) (**). .
. , .
= , . , , = = 1Ú = 2Ú = 3 Ú Ú = n . = { }. , . , . , , :
= Þ 2 = Û 2= 0Û 1, 2= Þ =1 Ú 3 = 2.
: {2}.