X - FIIT STU
X - FIIT STU
X - FIIT STU
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Príklad<br />
Nájdite riešenie systému lineárnych rovníc pomocou Crameroveho pravidla<br />
2x − 3x + x = 1<br />
1 2 3<br />
x + 2x − x = 0<br />
1 2 3<br />
2x + x + x =−1<br />
1 2 3<br />
Zostrojíme jednotlivé determinanty<br />
2 −3 1<br />
1 −3 1<br />
2 1 1<br />
A = 1 2 − 1 = 12, A<br />
1<br />
= 0 2 − 1 = 2, A<br />
2<br />
= 1 0 − 1 =−6, A<br />
3<br />
2 1 1<br />
−1 1 1<br />
2 −1 1<br />
2 −3 1<br />
= 1 2 0 =−10<br />
2 1 −1<br />
Potom riešenie<br />
2 1<br />
12 6<br />
x<br />
1<br />
= = , x2<br />
−6 1<br />
= =− , x3<br />
12 2<br />
−10 5<br />
= =−<br />
12 6<br />
Priesvitka 48