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Vieteove formule

Authored by Sara Gogic

Mathematics

9th - 10th Grade

Used 11+ times

Vieteove formule
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5 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Pronađi vrijednosti Vieteovih formula za zadanu kvadratnu jednadžbu  3x2+2x8=03x^2+2x-8=0  


 x1 +x2=23, x1×x2=83x_{1\ }+x_2=\frac{2}{3},\ x_1\times x_2=\frac{8}{3}  

 x1+x2=23, x1×x2=83x_1+x_2=-\frac{2}{3},\ x_1\times x_2=-\frac{8}{3}  

 x1+x2=23, x1×x2=83x_1+x_2=-\frac{2}{3},\ x_1\times x_2=\frac{8}{3}  

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Izračunaj vrijednost algebarskog izraza  1x1+1x2\frac{1}{x_1}+\frac{1}{x_2}  za zadanu kvadratnu jednadžbu  3x^2-x+2=0  

 1x1+1x2=13\frac{1}{x_1}+\frac{1}{x_2}=\frac{1}{3}  


 1x1+1x2=2\frac{1}{x_1}+\frac{1}{x_2}=2  

 1x1+1x2=12\frac{1}{x_1}+\frac{1}{x_2}=\frac{1}{2}  

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

U kvadratnoj jednadžbi mx2 - (3m+1)x + m = 0 odredi vrijednost nepoznatog parametra m tako da vrijedi x1 + x= 5

m=12m=\frac{1}{2}

m=53m=\frac{5}{3}

m=13m=\frac{\text{1}}{\text{3}}

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Kvadratni trinom x2 - 12x - 64 rastavi na linearne faktore

(x4)(x16)\left(x-4\right)\left(x-16\right)

(x+4)(x16)\left(x+4\right)\left(x-16\right)

(x4)(x+16)\left(x-4\right)\left(x+16\right)

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Zapiši kvadratnu jednadžbu čija su rješenja x1 = -3 i x2 = 2

x22x6x^2-2x-6

x2x3x^2-x-3

x2+x6x^2+x-6

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