(II)


- 9


, X (x, x+dx) Y 1 (y, y+dy),

,

, (5.1)

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

dx, dy .

:

 

1. y = f (x) = ax + b.

,

.

, b, |a| .

2. - y = f (x) (. 5.3).

, wY(y) .

y y

y2

y1

x1 x2 x 0 w(y)

w(x)

 

 

 

x1 x2 x

. 5.3. - .

 
y = f (x) ,

) < 0 > y2 wY (y) = 0, . . ( = 0) ( = y2,);