11.07.2015 Views

RIJEÅ ENI ZADACI IZ MATEMATIKE

RIJEÅ ENI ZADACI IZ MATEMATIKE

RIJEÅ ENI ZADACI IZ MATEMATIKE

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16. Gauss-Jordanovom metodom riješite sustav:Rješenje:2x + 3y − z = 85x − y + z = 93x − 4y + 3z = 10⎡⎤ ⎡32 3 −1 | 8 12− 1 ⎤2| 4⎣5 −1 1 | 9 ⎦ ∼ ⎣5 −1 1 | 9 ⎦ ∼3 −4 3 | 10 3 −4 3 | 10⎡312− 1 ⎤ ⎡32| 4 1∼ ⎣0 − 17 2− 1 ⎤2| 472 2| −11⎦ ∼ ⎣0 1 − 7 220 − 17 17| ⎦17∼92 2| −2 0 − 17 92 2| −2⎡⎤ ⎡⎤2 351 017|171 0 0 | 1∼ ⎣0 1 − 7 2217| ⎦17∼ ⎣0 1 0 | 5⎦0 0 1 | 9 0 0 1 | 9x = 1, y = 5, z = 917

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