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Kompleksni brojevi- ispravak

Authored by Aleksandra Kos

Mathematics

10th Grade

Used 5+ times

Kompleksni brojevi- ispravak
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10 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Odredi realne brojeve a i b iz jednakosti: a−b+5i=1+(a+b)ia-b+5i=1+\left(a+b\right)i  

 a=−2, b=4a=-2,\ b=4  

 a=3, b=−2a=3,\ b=-2  

 a=3, b=2a=3,\ b=2  

 a=−3, b=−2a=-3,\ b=-2  

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Izračunaj z+w ako je ; z=−12+i,   w=1−13iz=-\frac{1}{2}+i,\ \ \ w=1-\frac{1}{3}i  

 12+23i\frac{1}{2}+\frac{2}{3}i  

 −32+43i-\frac{3}{2}+\frac{4}{3}i  

 −16+76i-\frac{1}{6}+\frac{7}{6}i  

 12−23i\frac{1}{2}-\frac{2}{3}i  

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Izračunaj:  (1−2i)2\left(1-2i\right)^2  

 −3+4i-3+4i  

 3−4i3-4i  

 −3−4i-3-4i  

 2+3i2+3i  

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Koliko je: 1+i3+i6+i9+i12+i151+i^3+i^6+i^9+i^{12}+i^{15}  ?

 −1−i-1-i  

 1+5i1+5i  

 1+i1+i  

 1−i1-i  

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Odredi  z‾\overline{z}  ako je  z=(2−i)(1+2i)z=\left(2-i\right)\left(1+2i\right)  

 4+3i4+3i  

 4−3i4-3i  

 −4+3i-4+3i  

 2−i2-i  

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Odredi Re zRe\ z  ako je  z=i357(1−2i)(3+i)z=\frac{i^{357}}{\left(1-2i\right)\left(3+i\right)}  

 110i\frac{1}{10}i  

 −110i-\frac{1}{10}i  

 110\frac{1}{10}  

 −110-\frac{1}{10}  

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Izračunaj:  1−7i3−i\frac{1-7i}{3-i} 

 1−2i1-2i  

 1+2i1+2i  

 −i-i  

 3−i3-i  

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