11.07.2015 Views

RIJEÅ ENI ZADACI IZ MATEMATIKE

RIJEÅ ENI ZADACI IZ MATEMATIKE

RIJEÅ ENI ZADACI IZ MATEMATIKE

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⎡ ⎤ ⎡ ⎤ ⎡ ⎤1 0 135. Za koji su parametar t ∈ R vektori a 1 = ⎣2⎦, a 2 = ⎣0⎦, a 3 = ⎣−2⎦t t tlinearno zavisni?Rješenje:Vektori su linearno zavisni kad je detA = 0.1 0 1∣ ∣∣∣ 2 0 −2∣t t t ∣ = t · 1 1(−1)3+2 2 −2∣ == t · (−1) 5 (1 · (−2) − 1 · 2) == t · (−1)(−2 − 2) = t(−1)(−4) = 4t4t = 0t = 037

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