[obm-l] funcao

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] funcao
From: Klaus Ferraz <klausferraz@xxxxxxxxxxxx>
Date: Wed, 11 Jan 2006 22:03:36 +0000 (GMT)
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1)Sejam A e B conjuntos quaisquer, f: A-->B uma fun��o, g: A-->B uma fun��o bijetiva e a fun��o h=gofog^(-1). Mostre que :

a) f � injetiva <==> h � injetiva
b) f � sobrejetiva <==> h � sobrejetiva

Obs: g^(-1)= fun��o inversa de g