同济大学线性代数第六版答案(7)
时间：2025-07-12
0221222122212221222
22
=++++=d d c c b b a a (4)44442222
1111d c b a d c b a d c b a
(a b )(a c )(a d )(b c )(b d )(c d )(a b c d );
证明 4444
222
21111d c b a d c b a d c b a )
()()(0)()()(001111222222222a d d a c c a b b a d d a c c a b b a d a c a b ---------=
)
()()(111))()((222a d d a c c a b b d c b a d a c a b +++---= )
)(())((00111))()((a b d b d d a b c b c c b d b c a d a c a b ++-++------= )()(11))()()()((a b d d a b c c b d b c a d a c a b ++++-----=
=(a b )(a c )(a d )(b c )(b d )(c d )(a b c d )
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