I

${\phi }_i$

x_i

$A{A}_i=\left|{\phi }_i\right|$

$A{L}_i=\left|{\phi }_i\right|$

1

10

(4, 3)

10

2

4

(4, 3)

4

3

−17

(4, 3)

17

4

−3

(4, 3)

3