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Web skærmformat. - Aarhus Universitet

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V. Matricer – 4. Determinanter 418<br />

Rækkereduktionen 2 1 1 0<br />

5 3 0 1<br />

giver den inverse<br />

<br />

∼<br />

−1 2 1<br />

=<br />

5 3<br />

1 0 3 −1<br />

0 1 −5 2<br />

<br />

3<br />

<br />

−1<br />

−5 2<br />

3.32. Invers 2x2-matrix ☞ [LA] 6 Løsningsteknik<br />

Eksempel 4 - forsat<br />

Gør prøve<br />

−1 2 1<br />

=<br />

5 3<br />

Udregn <br />

2<br />

<br />

1 3<br />

<br />

−1<br />

5 3 −5 2<br />

4. Determinanter<br />

<br />

3<br />

<br />

−1<br />

−5 2<br />

=<br />

<br />

1 0<br />

0 1<br />

4.1. Oversigt ☞ [LA] 8<br />

Nøgleord og begreber<br />

✌ Helt simple determinanter

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