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176 CAPÍTULO 15. ¦£¦£ ££<br />

¡ ¨ § A =<br />

<br />

A<br />

β 1 −1<br />

A = β(β + 1)<br />

o ¨ ¢ ¢ ¡¤ ¡<br />

1 β + 1 1<br />

1 1 1<br />

<br />

β ∈ IR<br />

<br />

¢<br />

§ £ ¡ ¢ ¨ ¥ § ¢ ¡<br />

β <br />

A<br />

¡<br />

<br />

¨ <br />

¡ ¡ ¨ −1 A A<br />

z<br />

A<br />

<br />

¡ ¢ x ¨ <br />

y<br />

<br />

<br />

α + 1 −1 0 x 1<br />

(S)<br />

2 α − 1 0<br />

0 0 1<br />

<br />

α IR ∈<br />

¡ <br />

(S) £¢ ¢ <br />

(S)<br />

<br />

<br />

¡ ¨ A n ¨ α ∈ IR<br />

<br />

<br />

y<br />

z<br />

α A −1 A T = α n<br />

¡ ¨ A n ¨ <br />

<br />

<br />

β IR<br />

∈<br />

α = 0<br />

b<br />

bA22<br />

b<br />

˛<br />

bA11 = ˛ β + 1<br />

˛ 1<br />

1<br />

1<br />

˛ = β,<br />

˛<br />

bA21 = − ˛ 1<br />

˛ 1<br />

−1<br />

1<br />

˛ = −2,<br />

˛<br />

bA31 = ˛ 1<br />

˛ β + 1<br />

−1<br />

1<br />

˛ = β + 2,<br />

¨¥ ¨ § <br />

¢ ¡<br />

<br />

(βA) = β n−1 <br />

A.<br />

=<br />

(αA) 1<br />

α A = ( A) 2<br />

i = 1, 2, 3 j = 1, 3 2, Aij <br />

£¢ <br />

¢ (i, j) A<br />

¡<br />

b<br />

bA23<br />

b<br />

˛<br />

A12 = − ˛ 1<br />

˛ 1<br />

1<br />

1<br />

˛ = 0,<br />

˛<br />

= ˛ β<br />

˛ 1<br />

−1<br />

1<br />

˛ = β + 1,<br />

˛<br />

A32 = − ˛ β<br />

˛ 1<br />

−1<br />

1<br />

˛ = −β − 1,<br />

1<br />

1<br />

<br />

˛<br />

˛<br />

A13 = ˛ 1<br />

˛ 1<br />

β + 1<br />

1<br />

˛ = −β,<br />

˛<br />

= − ˛ β<br />

˛ 1<br />

1<br />

1<br />

˛ = −β + 1,<br />

˛<br />

A33 = ˛ β<br />

˛ 1<br />

1<br />

β + 1<br />

˛ = β2 + β − 1.

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