(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H
(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H
(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H
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2<br />
(x, y, z) = (2, 0, 0)<br />
+<br />
¢ <br />
λ P<br />
¡<br />
<br />
3 , 1, 0 + µ − 4<br />
3 , 0, 1 , λ, µ ∈ IR<br />
(1, 0, 2) ¡ <br />
<br />
u = (−2, 0)<br />
−1, v = (3, 0,<br />
<br />
2)<br />
¡ ¨ ¢ ¢ ©<br />
<br />
A = (2, 4)<br />
−1, B = (0, 0, 1)<br />
C = (0, 3, −5)<br />
<br />
(3, 0, 0) ¡ <br />
<br />
(1, 2,<br />
<br />
3)<br />
<br />
¨¥ ¨ u = (−2, −1, 0) v = (3, 0, 2)¢ <br />
<br />
<br />
P A = (1, 0, ¡<br />
u 2) £¢ ¢<br />
v<br />
P = A + 〈u, v〉 = (1, 0, 2) + 〈(−2, −1, 0), (3, 0, 2)〉<br />
¢ ¡<br />
P<br />
(x, y, z) = (1, 0, 2) + λ(−2, −1, 0) + µ(3, 0, 2), λ, µ ∈ IR<br />
¡ <br />
<br />
⎧<br />
⎪⎨<br />
⎪⎩<br />
x = 1 − 2λ + 3µ<br />
y = −λ<br />
z = 2 + 2µ<br />
λ, µ ∈ IR<br />
λ µ <br />
¥<br />
⎧<br />
<br />
⎪⎨<br />
⎪⎩<br />
λ = −y<br />
µ = 1<br />
(z − 2)<br />
2<br />
x = 1 − 2λ + 3µ = 1 + 2y + 3(z<br />
− 2)<br />
2<br />
(x, y, z) ∈ P ⇐⇒ x = 1 + 2y + 3(z<br />
− 2)<br />
2<br />
⇐⇒ 2x − 4y − 3z + 4 = 0<br />
129