Inverzna funkcija

Graf inverzne funkcije h f(x)=x^2 dobiš tako, da prezcališ naraščajočo vejo parabole preko simetrale lihih kvadrantov.
Povleci točko A po paraboli.

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Zakaj ne dobiš slike, če poskušaš vleči točko po padajoči veji parabole?
(Če izgubiš točko A, je najbolje, da ponovno naložiš stran.)

H funkciji f(x)=x^3 je inverzna funkcija definirana za vsa realna števila.
Nariši jo tako, da povlečeš točko A po paraboli.

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Pri naslednjem primeru ( f(x)=2^x ) vidiš, da je definicijsko območje inverzne funkcije enako zalogi vrednosti prvotne funkcije (in obratno).

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In še inverzna funkcija h f(x)=2^(-x)

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OJ, Sestavljeno z GeoGebra

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