.
n , a0, a1, , an , a0≠0 , an .
a0=1, .
. P(x) Q(x) S(x) R(x), P(x)=Q(x)∙S(x)+R(x), R(x) Q(x) R(x) 0. S(x) R(x) .
S(x) P(x) Q(x), R(x) .
P(x) Q(x) , Q(x) P(x).
, .
1.
.
Pn(x) x-c . Pn(x)=(x-c)Qn-1(x)+R, , R . Qn-1(x) R :
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. .1
, , (*):
a0 | a1 | an-1 | an | ||
b0 | b1 | bn-1 | R |
2. , , P5(x)=15-2x3+7x x-1.
.
-2 | 0 | 7 | 15 | |
1 | -2 | 0+1∙(-2)= -2 | 7+1∙(-2)= 5 | 15+1∙5= 20 |
, Q2(x)=-2x2 - 2x +5, R=20. :
15 - 2x3 + 7x = (-2x2 2- 2x +5)(x-1) + 20.
. P(x) Q(x) (a0xn+a1xn-1++an-1x+an b0xn+b1xn-1++bn-1x+bn) , x.
x0 P(x), P(x0)=0.
. x0 P(x) , P(x) x-x0, .. P(x) P(x)=(x-x0)∙Q(x)
: 1. x1, , xn Pn(x), Pn(x)=a0(x-1)(x-x2) (x-xn). 2. Pn(x) x-c Pn(c).
.
1. , .
2. , m , n .
|
|
.
1. P(x)=4x4-16x3+3x2-5x+17 Q(x)=2x2-3x+1.
2. P(x)=x4+2x3-3x2-4x+1 Q(x)=x+1, .
3. P(x)=2x4-5x3+3x2-x-2 .
4. P(x)=6x4+11x3+26x2-9x-10 , .
.
1. P(x)=6x6-4x5+2x3-3 Q(x)=x2-x+2.
2. P(x)=2x4-x+1 Q(x)=x+3, .
3. P(x)=x5-3x4-3x3-23x2-54x-30 .
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. .2