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Numere complexe

Authored by Maria Balan

Mathematics

10th Grade

Used 10+ times

Numere complexe
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10 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

dacă  z=5+2iz=5+2i  atunci  zz=z\cdot\overline{z}=  

 29\sqrt{29}  

 2121  

 52i5-2i  

29

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 (62i)(6+2i)=\left(6-2i\right)\cdot\left(6+2i\right)=  Calculați

40

36

32

4

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 Calculați   (5+3i)2\left(5+3i\right)^2  

34

 25+9i25+9i  

 2+6i2+6i  

 16+30i16+30i  

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 4+3i\left|4+3i\right|  Aflați

25

5

17

 17\sqrt{17}  

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 i2020i^{2020}  

 ii  

 i-i  

1

 1-1  

- 2020

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Sa se calculeze   i+i2+i3+...+i99i+i^2+i^3+...+i^{99}   

i

-i

0

1

1+i

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Sa se calculeze partea imaginara a numarului complex  z=1i1+iz=\frac{1-i}{1+i}  

 Im z=1Im\ z=1  

 Im z=0Im\ z=0  

 Im z=iIm\ z=i  

 Im z=iIm\ z=-i  

 Im z=1Im\ z=-1  

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