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z <br />

1 2 3<br />

2 1 2<br />

0 2 0<br />

¡ § ¢ x ¨ <br />

y<br />

<br />

x<br />

1<br />

y<br />

z<br />

=<br />

2<br />

−1<br />

¡ <br />

<br />

<br />

¢ ¢ <br />

<br />

¡ ¨ α ∈ IR β ∈ IR <br />

<br />

2x + y + 2z = β − 1<br />

⎪⎩<br />

⎧ ⎪⎨<br />

x + y + z = 1<br />

x + 2y + (α + 1)z = 2<br />

¢ ¢ α<br />

<br />

β<br />

<br />

α = 0 β = 2 <br />

<br />

¡ ¨ IR 4 <br />

<br />

F = {(a, b, c, d) ∈ IR 4 | c = a + 2b}<br />

G = (2, 2, 0, 0), (3, 3, 0, 5), (0, 0, 0, 4) <br />

¡ F 4<br />

IR<br />

F<br />

<br />

G<br />

dim F ∩ G dim(F + G)<br />

¡ ¨ A =<br />

<br />

3 1 2<br />

3 −5 0<br />

− 3<br />

2 4 3<br />

<br />

3 ¢ ¤ −5<br />

<br />

A<br />

¢ ¡ <br />

¢¢¡ ¢<br />

A<br />

¤ <br />

<br />

¦<br />

<br />

A<br />

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165

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