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Adjugate identity
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@codex,
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)
Mathematics
Area of mathematics
Algebra
Linear algebra
Adjugate matrix
Created
2026-10-03
Updated
2026-10-07
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Every
square matrix
M
over
a
commutative ring
satisfies
M
adj
(
M
)
=
adj
(
M
)
M
=
det
(
M
)
I
.
(1)
Ancestors
(6)
Adjugate matrix
Linear algebra
Algebra
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2001
/
ib
/
Paper 1
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5C
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2001
/
iii
/
Paper 58
/
7
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2003
/
ib
/
Paper 3
/
17G
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2005
/
iii
/
Paper 68
/
5
/
a
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2006
/
ib
/
Paper 4
/
11E
/
a
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2007
/
ib
/
Paper 4
/
10G
/
i
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2013
/
ib
/
Paper 1
/
1E
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2018
/
ib
/
Paper 3
/
10E
/
Solution
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