(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H
(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H
(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H
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156 CAPÍTULO 14. ¦£¦£ ££<br />
<br />
<br />
M−4 <br />
M−2 =<br />
=<br />
¢<br />
0<br />
0<br />
b<br />
− b<br />
2<br />
1<br />
− 1<br />
2<br />
(4) + ¢<br />
<br />
| b ∈ IR<br />
<br />
¢<br />
=<br />
0<br />
1<br />
− 1<br />
2<br />
(−4) = 1 + 1 = 2 < 3<br />
<br />
(−4) = dim M−4 = 1<br />
<br />
A<br />
¢¢¡ ¢ ¨ <br />
<br />
<br />
−→<br />
AB = B − A = (3, 2, 0) − (2, 1, 0) = (1, 1, 0)<br />
<br />
¡<br />
−→<br />
AC = C − A = (2, 2, 1) − (2, 1, 0) = (0, 1, 1)<br />
−→<br />
AB × −→<br />
AC =<br />
¢¢¡<br />
−→<br />
AB× −→<br />
AC<br />
2<br />
<br />
<br />
<br />
<br />
e1 e2 e3<br />
1 1 0<br />
0 1 1<br />
= e1−e2+e3<br />
2<br />
=<br />
<br />
<br />
<br />
= e1 − e2 + e3<br />
√ 1 2 +(−1) 2 +1 2<br />
R A<br />
<br />
¢ £¢ <br />
B<br />
2<br />
= √ 3<br />
2<br />
R = A + 〈 −→<br />
AB〉 = (2, 1, 0) + 〈(1, 1, 0)〉<br />
¢<br />
§ £ ¡ ¢ ¤£¦¥ § ¢ ©¨<br />
£¢ R ¡ <br />
(x, y, z) ∈ R ⇐⇒ (x, y, z) = (2, 1, 0) + λ(1, 1, 0) λ ∈ IR<br />
¢ £¢ ¢ ¡ <br />
<br />
⎧<br />
⎪⎨<br />
⎪⎩<br />
x = 2 + λ<br />
y = 1 + λ<br />
z = 0<br />
λ ∈ IR