Вектори

Вектори

8th Grade

10 Qs

quiz-placeholder

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Вектори

Вектори

Assessment

Quiz

Mathematics

8th Grade

Hard

Created by

Zornitza Kaneva

Used 104+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Даден е вектор  2а2\overrightarrow{а}  . Противоположен на него е векторът:

 0,2а-0,2\overrightarrow{а}  

 0а0\overrightarrow{а}  

 а-\overrightarrow{а}  

 2а-2\overrightarrow{а}  

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 АВNM AN CB\overrightarrow{АВ}-\overrightarrow{NM\ }-\overrightarrow{AN\ }-\overrightarrow{CB}  Векторът, който се получва от израза е:


 AC\overrightarrow{AC}  

 AN\overrightarrow{AN}  

 MC\overrightarrow{MC}  

 NC\overrightarrow{NC}  

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Точката М е от отсечката АВ и АМ : МВ = 3 : 5. Вярно е, че:


AM =35AB\overrightarrow{AM\ }=\frac{\text{3}}{5}\overrightarrow{AB}

AM=53AB\overrightarrow{AM}=\frac{5}{3}\overrightarrow{AB}

AM =3MB\overrightarrow{AM}\ =3\overrightarrow{MB}

AM=38AB\overrightarrow{AM}=\frac{3}{8}\overrightarrow{AB}

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Ако дължината на вектора

 АВ=8cm\overrightarrow{АВ}=8cm  , то дължината на  3АВ+2ВА34АВ3\overrightarrow{АВ}+2\overrightarrow{ВА}-\frac{3}{4}\overrightarrow{АВ}  е:

38 cm

2 cm

10 cm

24 cm

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Диагоналите на правоъгълника ABCD се пресичат в т.О. Противоположни вектори са:

AB\overrightarrow{AB} и BC\overrightarrow{BC}

AD\overrightarrow{AD} И BC\overrightarrow{BC}

AO\overrightarrow{AO} И CO\overrightarrow{CO}

BO\overrightarrow{BO} И OD\overrightarrow{OD}

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Ако  m =2 a 6 b +4 c \overrightarrow{m}\ =2\ \overrightarrow{a\ }-6\ \overrightarrow{b\ }+4\ \overrightarrow{c\ }  , то векторът  12m -\frac{1}{2}\overrightarrow{m\ } e равен на:

 a  3 b 2 c \overrightarrow{a\ }\ -3\ \overrightarrow{b\ }-2\ \overrightarrow{c\ }  

 a +3 b +2 c \overrightarrow{a\ }+3\ \overrightarrow{b\ }+2\ \overrightarrow{c\ }  

 a +3 b +2 c -\overrightarrow{a\ }+3\ \overrightarrow{b\ }+2\ \overrightarrow{c\ }  

 a +3 b 2 c -\overrightarrow{a\ }+3\ \overrightarrow{b\ }-2\ \overrightarrow{c\ }  

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Даден е успоредникът CDPN с пресечна точка на диагоналите Q. Векторът  CP\overrightarrow{CP}   e равен на сбора:

 CN  + PN\overrightarrow{CN\ }\ +\ \overrightarrow{PN}  

 CD  + DN\overrightarrow{CD\ }\ +\ \overrightarrow{DN}  

 QC +PQ\overrightarrow{QC}\ +\overrightarrow{PQ}  

 CD +CN\overrightarrow{CD}\ +\overrightarrow{CN}  

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