(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H

x − 1 = y−2
2
= z − 3
u = (1, 1)
2, v = (2, 1) ¢
2, P A = (1, 3) ¡ u 2, v
£¢ ¢
P = A + 〈u, v〉 = (1, 2, 3) + 〈(1, 2, 1), (2, 2, 1))〉
¢ P ¡
(x, y, z) = (1, 2, 3) + λ(1, 2, 1) + µ(2, 2, 1), λ, µ ∈ IR
⎧
⎪⎨
¡
x = 1 + λ + 2µ
⎪⎩
y = 2 + 2λ + 2µ
z = 3 + λ + µ
λ, µ ∈ IR
λ µ
¥
(x, y, z) ∈ P ⇐⇒ 1
2
(y − 2) = z − 3 ⇐⇒ y − 2z + 4 = 0
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