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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 1. Razmatramo funkciju f : R ! R; f (x) = x 2 : Ta funkcija nije ni injekcija nisurjekcija. Budući da je Im f = [0; +1i razmatramo suenjeg = f [0;+1i: [0; +1i ! [0; +1i ; g (x) = x 2 ;koje je bijekcija pa postoji inverzna funkcijag 1 : [0; +1i ! [0; +1i ; g 1 (y) = y 1 2 =p y:11y4y=xy4y=x22g (x) = x 2­4 ­2 2 4x­4 ­2 2 4xg 1 (x) = p x­2­2h (x) = x 2­4­4h 1 (x) =p x

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