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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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21Nadalje, kako je f f 1 (y) = y i f 1 f (x) = x, to jeSvojstva:a log a y = y i log a a x = x:log a (xy) = log a x + log a yxlog ay = log a x log a ylog a x k= k log a xlog a x = log b xlog b ax=b=) log a b log b a = 1a=b k=) log bk x = 1 k log b x:U primjeni vanu ulogu igraju eksponencijalne i logaritamske funkcije s bazom 10 i sbazom e, gdje je e = 2:71828::: transcendentan broj. Logaritam po bazi 10 nazivamodekadski ili Briggsov logaritam, a logaritam po bazi e prirodni logaritam. Zbognjihove vanosti za njih koristimo posebne oznake. Tako je log 10 = log, a log e = ln.

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