3 1 1 1 z 43 44 3 3.1 1 3.1.1 1 n 0 a0;a1;a2;111 (a0 6= 0) P(z) = a0zn + a1zn01 + 111+ an01z + an (3.1) n z P(z), Q(z) z Q(z) 6� 0 P(z) Q(z) = a0zn + a1zn01 + 111+ an01z + an b0zm + b1zm01 + 111+ bm01z + bm (3.2) a;b;c;d 1 w = az + b cz + d ; (ad 0bc 6= 0) (3.3) 1 1 1 1 (3.3) w = (bc 0ad)=c cz + d + a c (3.4) 1 1. w = z + 2. w = z 3. w = 1=z 3 3 (1) , (2) O P OP = 1=OQ Q P Q 3.1 1 45 3.1 1=z z 1=�