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Polinomi 3

Total questions: 11

Worksheet time: 11mins

Name
Class
Date
1.

Dan je polinom  p(x)=x5−3x7+2x−7x4+14p(x)=x^5-3x^7+2x-7x^4+14  Polinomska stopnja  p(x)p(x)  je

a)

1

b)

4

c)

5

d)

7

e)

14

2.

Rezultati polinomskega seštevanja  x3−2x+1x^3-2x+1  in x4−x3+3xx^4-x^3+3x  je

a)

x4+2x3+5x+1x^4+2x^3+5x+1  

b)

x4+2x3+x+1x^4+2x^3+x+1  

c)

x4−x+1x^4-x+1  

d)

x4+x+1x^4+x+1  

e)

x4+x3−5x+1x^4+x^3-5x+1  

3.

Produkt polinomov   p(x)=(8−x) in q(x)=(2−x+x3)p\left(x\right)=(8-x)\ in\ q\left(x\right)=(2-x+x^3)  je

a)

−x4+6x3+x2−10x+16-x^4+6x^3+x^2-10x+16  

b)

−x4−6x3+x2−10x+16-x^4-6x^3+x^2-10x+16  

c)

−x4+8x3+x2−10x+16-x^4+8x^3+x^2-10x+16  

d)

−x4+8x3−x2−10x+16-x^4+8x^3-x^2-10x+16  

e)

−x4+8x3−x2+10x+16-x^4+8x^3-x^2+10x+16  

4.

Polinomska vrednost  g(x)=x4+5x3+2x2−5x+3g(x)=x^4+5x^3+2x^2-5x+3  v  x=−2x=-2  je

a)

−3-3  

b)

−1-1  

c)

11  

d)

22  

e)

33  

5.

f(x)=5x4−3x3+2x2−6f\left(x\right)=5x^4-3x^3+2x^2-6  in g(x)=3x3−6x2+12x+4g\left(x\right)=3x^3-6x^2+12x+4 . Koliko je 𝑓(𝑥) + 𝑔(𝑥) ?

a)

5𝑥4 – 8𝑥2 + 12𝑥 + 2

b)

5𝑥4 – 4𝑥2 + 12𝑥 – 2

c)

5𝑥4 – 𝑥3 – 4𝑥2 + 12𝑥 – 2

d)

𝑥4 – 8𝑥2 + 12𝑥 – 2

e)

𝑥3 – 4𝑥2 + 12𝑥 – 2

6.

𝑓(𝑥) = 4𝑥3 – 5𝑥2 + 8𝑥 – 1 in 𝑔(𝑥) = 4𝑥3 + 2𝑥2 – 5. Kaj je vodilni koeficient polinoma [𝑓(𝑥) – 𝑔(𝑥)]?

a)

– 1

b)

– 4

c)

– 7

d)

5

e)

8

7.

Če je polinom f(x) 5. stopnje in polinom g(x) 3. stopnje, je polinomska stopnja g(x) – f(x) enaka

a)

8

b)

5

c)

3

d)

2

e)

1

8.

Razmislite o naslednjih algebrskih oblikah.
(i) x3−3x2−2x+5x^3-3x^2-2x+5  
(ii)  x3−3x2+sin⁡3x+3x^3-3x^2+\sin3x+3  
(iii)  x3−3x2−x2+4x^3-3x^2-\frac{x}{2}+4  
(iv)  x4−3x2−4x+3x^4-3x^2-\frac{4}{x}+3  
Algebrska oblika, ki je polinom, je ....

a)

(i) in (ii)

b)

(i) in (iii)

c)

(i) in (iv)

d)

(ii) in (iii)

e)

(iii) in (iv)

9.

Razmisli!
(i) x5−34x2−x+54x^5-\frac{3}{4}x^2-x+\frac{5}{4}  
(ii)  x5−3x3+xcos⁡2x+6x^5-3x^3+x\cos2x+6  
(iii)  x3−5x2−xx+4x^3-5x^2-x\sqrt{x}+4  
(iv)  x5−3x4+7x3+4x2−x+4x+3x^5-3x^4+7x^3+4x^2-x+\frac{4}{x}+3  
Algebrske oblike, ki NISO polinomi, so ....

a)

(i) in (ii)

b)

(ii) in (iii)

c)

(ii), (iii) in (iv)

d)

(i), (iii) in (iv)

10.

Prosti člen polinoma  p(x)=2x5+3x4−5x3−6x2+7x−9p\left(x\right)=2x^5+3x^4-5x^3-6x^2+7x-9  je

a)

2

b)

3

c)

-5

d)

7

e)

-9

11.

Vodilni člen polinoma p(x)=3x4−2x3+5x−4p\left(x\right)=3x^4-2x^3+5x-4  je

a)

- 4

b)

3

c)

x3x^3  

d)

2x32x^3  

e)

3x43x^4