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matrics 2 × 2

Penderfynydd, olrhain, norm a gwrthdro matrics 2×2.

Ddigidau arwyddocaol

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Fformiwlâu

\det A=a_{11}a_{22}-a_{12}a_{21}

\operatorname{tr}A=a_{11}+a_{22}

||A||_F=\sqrt{\sum a_{ij}^2}

A^{-1}_{11}=a_{22}/\det A

A^{-1}_{12}=-a_{12}/\det A

A^{-1}_{21}=-a_{21}/\det A

A^{-1}_{22}=a_{11}/\det A

Penderfynydd, olrhain, norm a gwrthdro matrics 2×2.