e
1
=
(
1
,
0
)
e
2
=
(
0
,
1
)
\mathbf{e}_1 = (1, 0) \quad\mathbf{e}_2 = (0, 1)
e
1
=
(
1
,
0
)
e
2
=
(
0
,
1
)
e
1
\mathbf{e_1}
e
1
e
2
\mathbf{e_2}
e
2
P
=
(
−
2.00
,
−
1.00
)
\mathit{P = ( -2.00, -1.00)}
P
=
(
−
2
.
0
0
,
−
1
.
0
0
)