, , .
:
(6)
, f(x) , [a; b] , h , (). , [a; b] 2, n ( h) (6) .
(1) - (3) (5) (6) , ( h2). .
. f() , (6) f"() .
, , . n h, h, (. . ), .
. [, b] n = 2m
=x0<x1<...<xn-1<xn=b.
2.5
y0, y1,...,yn , , =0 (. 2.5). (0, 0), (x1, 1), (2, 2) , .
= 2 + + (7)
[0, 2] , (7), :
, :
(8)
, , (7) (8) , , 0, 1, 2, f(x) 0, 1, 2. , ,
(9)
(9) 4 (9),
0 + 41 + 2 = [x02 + (0 + 2)2 + x22] + [0 + 2(0 + 2) + 2] + 6 =
= 2 (x02 + 02 + x22) + 3B (0 + 2) + 6, (10)
(8).
(10) (8) ,
x2 x0=2h, h = (b a)/n,
. (11)
, :
(12)
(11) (12) , :
(13)
, . , ( ) . 0 2m , .
|
|
. . , , ( ). , (+1;-1). ,
,
.
n :
,
, , n.
, :
,
n = 2, 3, 4 .
2 n = 2, 3, 4
n = 2 | +0.5773502692 -0.5773502692 | 1.000 |
n = 3 | +0.7745966692 -0.7745966692 0.00000000000 | +0.5555555556 -0.5555555556 0.8888888889 |
n = 4 | +0.8611363116 -0.8611363116 +0.3399810436 -0.3399810436 | +0.3478548451 -0.3478548451 +0.6521451540 -0.6521451540 |