f (x) [ a, b ] , , .. f / (x) ³ 0.
f (x) [ a, b ] (, b), f / (x) > 0 a < x < b, [ a, b ] (. 3.1).
, f (x) [ a, b ], f / (x)£0 . f ¢ (x)<0 (a, b), f (x) [ a, b ] (. 3.2).
, , f (x) [ a, b ] (a, b).
f (x) 1 , , 1. f (x) 2 , f (x2 + D x) > f(x2) D (D ).
, , , . .
.
( ) f(x) = 1 1 , .
. , , . = 3, = 0 , , .
, .
, .
: f(x) = ôxô : f(x) =
= 0 , | = 0 , , |
, f(x) , .
( )
f(x) ( a, b), 1, (, , 1).
1 f¢(x) + , = 1 f( x ) , + , .
:
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1) .
2) .
3) .
4) .