6 , r(cosj + i sinj) , .
[r(cosj + i sinj)]n= rn(cos nj + i sin nj)
Z n w ( />), Zn =w.
, Zn =w n w. , , n w, Zn =w. w=0, n Zn=w Z = 0. w/>0, Z />, , , Zw
Z = r(cosj + i sinj), w = p(cosy + i siny)
Zn = w :
rn(cos nj + i sin nj) = p(cosy + i siny)
, , , 2p. , rn = p nj = y + 2pk, kÎZ r = />j = />, kÎZ.
, :
ZK=/>[cos(/>) + i sin(/>)], kÎZ (8)
8 .
, w/>0, n n w: 8. n w />, , , />. , , n w, , n , /> Z = 0.
/> . , , , . , />, , , i i, , .
8 n. n:
an×Zn +an1×Zn1<sup/>+...+a1×Z1<sup/>+a0<sub/>= (9)
an,..., a0<sub/> .
: . 1779 .
, , 9 :,
Z1,<sub/>Z2,...,<sub/>ZK ,
a1,a2,...,ak <sub/> , :
a1+ a2 + + ak = n
, Z1,<sub/>Z2,...,<sub/>ZK 9. , Z1 <sub/> a1, Z2<sub/> a2 .
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, , : n n .
, , . , , . . : .
:
Z = k
an×Zn + an1×Zn1<sup/>+...+ a1×Z1<sup/>+ a0<sub/>= 0
.
an×kn + an1×kn1<sup/>+...+ a1×k1<sup/>+ a0<sub/>= 0
a0<sub/>= k(an×kn1 + an1×kn2 +...+ a1)
, , , , k a0.