Coordonatele unui vector

Coordonatele unui vector

10th Grade

18 Qs

quiz-placeholder

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Coordonatele unui vector

Coordonatele unui vector

Assessment

Quiz

Mathematics

10th Grade

Hard

Created by

PETRONELA ALEXANDRU

Used 3+ times

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18 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Într-un sistem de coordonate xOy cu  i\overrightarrow{i}  si  j\overrightarrow{j}  versori ai axelor Ox și Oy, vectorul de poziție al punctului A(1,2) este egal cu:

 OA=i+2j\overrightarrow{OA}=-\overrightarrow{i}+2\overrightarrow{j}  

 OA =i+2j\overrightarrow{OA}\ =\overrightarrow{i}+2\overrightarrow{j}  

 AO =i2j\overrightarrow{AO}\ =\overrightarrow{i}-2\overrightarrow{j}  

 AO  =2i+j\overrightarrow{AO\ }\ =2\overrightarrow{i}+\overrightarrow{j}  

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

(-3, -1)

(-1,15)

(3, 1)

(-1, 1)

3.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Modulul vectorului   v=3i+4j\overrightarrow{v}=3\overrightarrow{i}+4\overrightarrow{j}  este egal cu:

7

6

5

4

4.

MULTIPLE SELECT QUESTION

1 min • 1 pt

Dacă    u=2i+5j\overrightarrow{u}=2\overrightarrow{i}+5\overrightarrow{j}  și  v=3i+j\overrightarrow{v}=-3\overrightarrow{i}+\overrightarrow{j}  atunci vectorul   w=2u3v\overrightarrow{w}=2\overrightarrow{u}-3\overrightarrow{v}  este egal cu:

  13i+7j13\overrightarrow{i}+7\overrightarrow{j}  

 5i+7j-5\overrightarrow{i}+7\overrightarrow{j}  

 5i+7j5\overrightarrow{i}+7\overrightarrow{j}  

 13i7j-13\overrightarrow{i}-7\overrightarrow{j}  

5.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Fie  A(12, a4).A\left(12,\ a-4\right).  Aflați numărul a>0 știind că lungimea vectorului  OA\overrightarrow{OA}  este 20. 

6.

FILL IN THE BLANK QUESTION

45 sec • 1 pt

Fie punctele

 A(3, 1)A\left(3,\ -1\right)   și  B(1, 4)B\left(-1,\ -4\right)  Lungimea segmentului AB este egală cu:

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Fie  A(1,3)A\left(1,3\right)  și  B(2,5)B\left(-2,5\right)  . Descompunerea vectorului  AB\overrightarrow{AB}  după versorii  i \overrightarrow{i\ } și  j \overrightarrow{j\ }  este: 


 3i+8j3\overrightarrow{i}+8\overrightarrow{j}  

 3i+2j-3\overrightarrow{i}+2\overrightarrow{j}  

 ij\overrightarrow{i}-\overrightarrow{j}  

 i+j\overrightarrow{i}+\overrightarrow{j}  

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