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MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

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Primjer. Na ¯dite parametarsku jednadbu pravca pzadanog kao presjek ravnina x + y z + 1 = 0;p:::x + 2y + z + 2 = 0 :Promatramo proširenu matricu gornjeg sustava 1 1 1A p = [A jb] =1 1 0 31 2 1 ::: 2 0 1 2 0 1 [A R jb 0 ]Budući je n = 3; rang (A) = rang (A p ) = 2; ondaimamo jednoparametarsko rješenjez = t; x = 3t; y = 1 2t, t 2 Rili8< x = 3t;p::: y = 1 2t;:z = t;, t 2 R; ili p:::: x 3 = y + 12 = z 1 :

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