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X - FIIT STU

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Za predpokladu, že matica koeficientov A je regulárna, riešenie systému<br />

lineárnych rovníc má tento explicitný tvar<br />

−1<br />

x = A b<br />

Nájdite inverznú maticu k matici<br />

Zavedieme matice<br />

Príklad<br />

2x1+ 4x2<br />

= 1<br />

x + 4x<br />

= 2<br />

1 2<br />

⎛2 4⎞ ⎛x1<br />

⎞ ⎛1⎞<br />

A= ⎜ , ,<br />

1 4<br />

⎟ x = ⎜ =<br />

x<br />

⎟ b ⎜<br />

2<br />

2<br />

⎟<br />

⎝ ⎠ ⎝ ⎠ ⎝ ⎠<br />

Priesvitka 6

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