Question

完美女孩

請問第13題
旁邊是詳解 但看不太懂😵
求解🙏🙏

==3
B = 4
X + B = = = 2 / 2B = 7:3
(5) (=(a+B) -32B(以+B)
13.多項式 f(x)=x" +5x"-2x+x+6,選出下列正確的選項:
(1) f(x)除以x+1之餘式為 15 |+5+2+3+6
(一)(又十天
(2)f(x)除以x+x+1之餘式為x-4
3%
= 8 - qx 2 = -10
D=(x+B*)(x+B) - d*B*(a+B)
(3) f(x)除以x+x+1之餘式為x+4
=(-2)(-10) - 9 (+2):20-18:2
(4) f(x)除以 x' + 2x* +2x+1之餘式為4x' +5x+8(3+2+2+4)-(b+c+8+d)
(5) f(x)除以x+2x²+2x+1之餘式為4.x-5x+8

(5) C
13. (1) f(-1)=1+5+2+1+6=15
(2)(3) f(x) = (x³) ·x² +5(x³)³ · x − 2(x³)² ·x+x² +6
x'=1⇒ x² +5x−24+x² +6=2x²+3x+6
236
6-1
-2 -2-1
2 1 4 …… 所求餘式x+4
(4) (5) ƒ(x)=(x+1)(x²+x+1)Q(x)+ a(x²+x+1)+x+4
x=-1⇒a+3=15⇒a=12, Ep 12x² +13x+16