Cao đẳng - Đại học
... z 1 , z 1 v`az2(h˜ay v˜e h`ınh). 1. 1. D-i.nh ngh˜ıa sˆo´ph´u.c 7(a 1 ,b 1 )+(a2,b2)def=(a 1 + a2,b 1 + b2). 1 (III) Ph´ep nhˆan(a 1 ,b 1 )(a2,b2)def=(a 1 a2− b 1 b2,a 1 b2+ ... d´oP (z)=a0zn+ a 1 zn 1 + ···+ an 1 z + an= a0zn+ a 1 zn 1 + ···+ an 1 z + an= a0(z)n+ a 1 (z)n 1 + ···+ an 1 z + an= a0(z)n+ a 1 (z)n 1 + ···+ an 1 z + an= P (z).T`u.d´oc˜ung ... ta c´o:Σ =1+ az + a2z2+ ···+ anzn=an +1 zn +1 − 1 az − 1 (nhˆan tu.’sˆo´v`a mˆa˜usˆo´v´o.iaz− 1) =an+2zn− an +1 zn +1 −a2 +1 a2− az + 1 z +1 (do z + 1 z= 2...