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Afritað á klemmuspjald

det(\left(\begin{matrix}48&90\\100&10\end{matrix}\right))

Finndu ákveðu fylkisins.

48\times 10-90\times 100

Fyrir 2\times 2 fylkið \left(\begin{matrix}a&b\\c&d\end{matrix}\right) er ákvörðunin ad-bc.

480-90\times 100

Margfaldaðu 48 sinnum 10.

480-9000

Margfaldaðu 90 sinnum 100.

-8520

Dragðu 9000 frá 480.

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