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§ ¡ £¢¥¤ ¨ ¦ ¨ ¢ ¨§ ©¨ <br />

<br />

¡ ¨ § ¢ x y <br />

<br />

z<br />

(S)<br />

<br />

2α − 1 −2α −1<br />

2α + 3 2α − 2 0<br />

2 2α − 1 1<br />

<br />

x 1<br />

= 1<br />

<br />

α IR ∈ ¡ <br />

(S) ¢ ¢ <br />

(S)<br />

<br />

¡ ¨ A =<br />

<br />

A<br />

β 1 1<br />

1 2 3<br />

β − 1 1 1<br />

<br />

y<br />

z<br />

β ∈ IR<br />

<br />

A β <br />

det<br />

¡ ¨ <br />

A <br />

¡ ¨ −1 A A<br />

A<br />

<br />

¡ ¨ α, β ∈ IR <br />

<br />

⎧<br />

⎪⎨<br />

⎪⎩<br />

x + 2y + 3z = 1<br />

3x + αy + 2z = β<br />

2x + 3y + z = 2<br />

¢ ¢ α<br />

<br />

β<br />

¥ <br />

α =<br />

<br />

6<br />

¡ ¨ a b <br />

<br />

Fa,b = {(x, ax + b) | x ∈ IR}<br />

IR 2<br />

¡<br />

¡ ¨ IR 4 <br />

F = {(a, b, c, d) ∈ IR 4 | d = a + b c + d = 0}<br />

G = (2, 1, −3, 3), (1, −1, 0, 0), (1, 1, −2, 2) <br />

1<br />

<br />

191

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