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Web skærmformat. - Aarhus Universitet

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V. Matricer – 4. Determinanter 419<br />

✌ Determinant defineret<br />

✌ Effektive regneregler<br />

✌ Genkend determinant nul<br />

✌ Test determinant nul<br />

✌ Produktreglen<br />

✌ Inversreglen<br />

✌ Test inversregel og produktregel<br />

✌ Potensreglen<br />

✌ Entydig løsning<br />

✌ Test entydig løsning<br />

4.2. Nemme determinanter ☞ [LA] 8 Determinanter<br />

Eksempler<br />

Determinanten af en kvadratisk matrix<br />

• 1-matrix<br />

|a11| = a11<br />

• 2-matrix <br />

a11 a12<br />

<br />

= a11a22 − a12a21<br />

a21 a22

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