1.
. , , , . = f (x).
, y.
, .
. x . f(x) D(f).
. f (x) (. . y) ( , ) E(f).
. y = f (x) (a, b), x1 x2 , x1< x2, f(x1) ≤ f(x2). x1<x2 f (x1) < f (x2), (a, b).
. y = f (x) (a, b), x1 x2 , x1 < x2, f (x1) ≥ f (x2). x1< x2 f(x1) > f(x2), (a, b).
. y = f(x) , x, , f (-x) = f (x). 0 y.
. y = f(x) , x, , f (-x) = -f (x).
. y = f (x) , T, x x + T, , f (x + T) = f(x). T . (sinx, cosx, tgx, ctgx ...)
y = f(x), , , 1. 0 x1 = x0 + Δ x, Δ x - , , .
. Δy , Δx:
Δx Δy
. y = f(x) x Δy Δx, , :
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y'(x) - x ( f'(x)), Δ y - , Δx ( y'(x) ).
y = f (x) x, x. y = f (x) (, ), . '(x) x.
. .
. s(t) :