: .
, .
, . , x y , .
, . , x y , .
, .
(), .
f (x) D, x1 x2 D , x1 < x2, f (x1) < f (x2).
f (x) D, x1 x2 D , x1 < x2, f (x1) > f (x2).
y = f (x),. [a; x1) (x2; b] (x1; x2). , [a; x1) (x2; b],
, .
, f D (f (x)), f (x) = const .
, x1 < x2 D (f(x)), f (x1) = f (x2) = 0, .
(, D).
.
.
f , cf (c > 0) f + c , cf (c < 0) . c .
f , 1/f .
f , 充.., .
f n , f n .
g (f (x)) f g .
.
|