. :
=15,4; = -10,8
. :
A =
A -1 = ,
det A - ;
i j - .
det A = 5 · 30,0 10,0 · 10,0 = 50,0.
A -1 =
8. ( ).
A C = B C* = A-1 B, ..
C* = .
y(x)
y = 10,8 + 15,4 x.
.
. 2 . 1.
2
i | xi | yi | y(xi) | i = yi y(xi) |
0,0 1,0 2,0 3,0 4,0 | 0,0 1,0 8,0 27,0 64,0 | 10,8 4,6 20,0 35,4 50,8 | 10,8 3,6 12,0 8,4 13,2 |
. 1. y=f(x), y=
J min = J(C ) = (10,8)2 + ( 3,6)2 + ( 12,0)2 + ( 8,4)2 + (13, 2)2 = 518,4,
, ,
max| | = 13,2 x = x5 = 4,0.