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)(:

fI

f ( )f II-1f:

:

( ) ( )

( )

1f x y f y x

x I y f I

-= =

( )( )1x I f f x x-" o =( )

( )( )1y f I f f y y-" o =

: fI

x( )f IyI

:( ) ( )1f x y f y x- = =

yx1( )f x-x( )f I

:

f I1f-( )f I

:

fI 0x( )f I( )0 0y f x=

f0x( )0f ' x 0

1f-0y

:( ) ( )( )

10

0

' 1f y

f ' x

- =

fIfIf 'I

1f-( )f I

:( ) ( ) ( )( )

1

1

' 1x f I f x

f ' f x

-

-" =

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:

f I

-1f f

:

:

( )fC( )1fC -

( ) ( )fA a,b C( ) ( )1fA' b,a C -

:x a=

:y a=

:y b=:x b=

:y ax b= +

:

1 by x

a a

= +

:x ay b= +

)()(

)(

)(

fI

-f1f