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Тестове по математика

Vectors


author: Martin Marinov
viewed: 2088 times
Българска версия: BG

D: Line that has an end that is considered first, and an end that is considered second is called vector
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Parts of a vector:
The first end is called beginning and the second one is called end of the vector.

Length of a vector AB→ (a→) equals the length of the line AB and is marked as |AB→|=AB(|a→|=a).
The direction from A to B is called direction of the vector AB→

  D: The two vectors AB→ and CD→ are called unidirectional (one direction):
       a) when they lie on one line and one of the rays AB→ or CD→ is contained by the other;

       b) when they lie on parallel lines and the ends F and H are in one half-plane according EG. We mark EF→ ↑↑ GH→











  D: The vectors AB→ and CD→ are called bidirectional (different directions):
       a) when they lie on one line and the neither of the rays AB→ and CD→ is contained by the other one;

       b) when they lie on parallel lines and the neds I and J are in different half-planes according HI. We mark AB→ ↑↓ CD→ 




D: If both ends of a vector are identical, then the vector is called zero vector and is marked as AA→=0→
D: Two vectors are equal, if they are unidirectional and have same lengths
D: Two vectors are oposed, if they are bidirectional and have same lengths