[ a, b ] y = f (x) (. 13.1). [ a, b ] n x 1 , x 2 ,, xn 1 . a = x 0 ; b = xn.
[ xk 1 , xk ] k - . k -
xk = xk xk 1 .
d k -
.
[ xk 1 , xk ] k, f ( k)
.
f (x) [ a, b ]. , .
( ), f (x) a b, f (x) [ a, b ].
:
.
a b , f (x), , .
, , , .
. . 7.1,
.
, , , y = f (x) [ a, b ].
. 7.1. y = f (x)
, , ( ), y = f (x), x x = a x = b (. 7.2).
. 7.2.
, , , , , f (x) < 0 [ a, b ] f (x) .
, (. . ) - , .
, f (t). , (. . ). V , t 1 t 2,
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