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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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Denicija 5.2. Za funkcije f : A 1 ! B 1 ig : A 2 ! B 2 kaemo da su jednake i pišemo f = g;ako je A 1 = A 2 ; B 1 = B 2 i f (x) = g (x) za svakix 2 A 1 = A 2 :Ili(A 1 ; f; B 1 ) = (A 2 ; g; B 2 ) ()A 1 = A 2 ^ B 1 = B 2 ^ (8x 2 A 1 = A 2 ) (f (x) = g (x))Primjer.f (x) = x;g (x) = x2x :Vrijedi: f 6= g jer je D f = R 6= Rn f0g = D g :Grafom funkcije f : A! B nazivamo skupf = f(x; f (x)) j x 2 Ag AB:Što bi bili grafovi funkcija iz prethodnog primjera?Skiciraj ih i usporedi!

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