(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H
(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H
(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H
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P A = (3, 0) ¡ <br />
0,<br />
(1, 2,<br />
<br />
3)<br />
£¢<br />
X = (x, y, z) ∈ P ⇐⇒ −−→<br />
AX | (1, 2, 3) = 0<br />
⇐⇒ (x − 3, y, z) | (1, 2, 3) = 0<br />
⇐⇒ (x − 3) + 2y + 3z = 0<br />
⇐⇒ x + 2y + 3z − 3 = 0<br />
<br />
<br />
(x, y, z) ∈ P ⇐⇒ (x, y, z) = (3 − 2y − 3z, y, z)<br />
⇐⇒ (x, y, z) = (3, 0, 0) + (−2y − 3z, y, z)<br />
⇐⇒ (x, y, z) = (3, 0, 0) + y(−2, 1, 0) + z(−3, 0, 1)<br />
<br />
(x, y, z) = (3, 0, 0) + λ(−2, 1, 0) + µ(−3, 0, 1), λ, µ ∈ IR<br />
¢ P<br />
<br />
¡<br />
¡ ¨ R ¢ ¡ <br />
<br />
x − 3 = z y = z − 1<br />
¢ <br />
S<br />
(1, 3) ¡ ¡ −2,<br />
<br />
R<br />
R S <br />
<br />
¢ <br />
<br />
(1, −2, 3) ¡<br />
¢<br />
<br />
3x − z = y −<br />
<br />
2<br />
¨¥ ¨ R ¢ ¡ <br />
<br />
x − 3 = z y = z − 1<br />
131