Numere complexe - recapitulare

Numere complexe - recapitulare

10th Grade

10 Qs

quiz-placeholder

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Numere complexe - recapitulare

Numere complexe - recapitulare

Assessment

Quiz

Mathematics

10th Grade

Practice Problem

Hard

Created by

Andreea Țui

Used 8+ times

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10 questions

Show all answers

1.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Conjugatul numărului complex

 z=6+8iz=6+8i  este: 

2.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Opusul numărului complex  z=35iz=3-5i  este: 

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Inversul numărului complex   z=1+iz=1+i  este: 

 1i1-i  

 1212i\frac{1}{2}-\frac{1}{2}i  

 12+12i\frac{1}{2}+\frac{1}{2}i  

 22  

4.

FILL IN THE BLANK QUESTION

2 mins • 1 pt

Fie   z1=2+3iz_1=2+3i   și    z2=73iz_2=7-3i  . Calculați  z1+z2z_1+z_2  


5.

FILL IN THE BLANK QUESTION

2 mins • 1 pt

Fie   z1=2+3iz_1=2+3i   și    z2=73iz_2=7-3i  . Calculați  z1z2z_1-z_2  


6.

FILL IN THE BLANK QUESTION

3 mins • 1 pt

Fie   z1=2+3iz_1=2+3i   și    z2=73iz_2=7-3i  . Calculați  z1z2z_1\cdot z_2  


7.

FILL IN THE BLANK QUESTION

2 mins • 1 pt

Se consideră ecuația:  2x27x+21=02x^2-7x+21=0  

Calculați   x1+x2+2x1x2.x_1+x_2+2\cdot x_1x_2.  

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