Linear Algebra

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Last updated 2:20 AM on 10/13/26
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10 Terms

1
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(AB)^-1 =

B^-1A^-1

2
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(A^T)^-1 =

(A^-1)^T

3
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(cA)^-1 =

1/c A ^-1

4
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formula for A^-1 (shortcut for 2×2 matrix)


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5
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general formula for A^-1

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6
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AdjA =

C^T

7
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Condition for symmetric matrix

a square matrix where A = A^T

8
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definition of skew symmetric matrix

a square matrix where A^T = -A

9
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a square matrix is orthogonal if…

A^-1 = A^T

10
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matrix is singular when…

det = 0