(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H

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¢
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A ¡ n ¨ £¢ A = 0
−1 T α A A = αn
−1 T A A = αn ) −1 (A
n = α 1
n A = α
A
β = 0 β = ¡
0
A T
(βA) (βA) = det (βA) In ⇐⇒ (βA) (βA) = β n det AIn
⇐⇒ A (βA) = β n−1 (det A) In
⇐⇒ (βA) = β n−1 (det A) InA −1
⇐⇒ (βA) = β n−1 (det A) A −1
⇐⇒ (βA) = β n−1 A
α =
0
β = 1 α β α
=
(αA) = α n−1 A 1
α A = 1
α
(αA)
1
α A = α n−1 1 A αn−1
n−1 A = 1
α n−1
A
α A = n−1
αn−1 2
A) = ( 2
A) (