13.07.2015 Views

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 2. Pokaimolimn!1Razlikujemo slucajeve:np a = 1; a > 0:(L1) a = 1 =) niz konvergira (stacionaran niz) ilimn!1np1 = limn!11 = 1; a > 1Pokaimo (L1) koristeći Deniciju 6.4 (def. limesa).Neka je " > 0 i neka je ja n Lj < "; tj. np a 1 < ":Treba pronaći n 0 (iz Denicije 6.4). Imamo np a 1 < " () np a 1 < " () np a < 1 + " ()1nln aln a < ln (1 + ") () n >ln (1 + ") ln a=) n + 1 = n 0 :ln (1 + ")

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