
Скалярное произведение 9 класс

Flashcard
•
Mathematics
•
9th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Скалярное произведение векторов a и b вычисляется по формуле:
Back
x₁x₂ + y₁y₂
2.
FLASHCARD QUESTION
Front
Если скалярное произведение двух ненулевых векторов равно нулю, то эти векторы:
Back
перпендикулярные
3.
FLASHCARD QUESTION
Front
Скалярное произведение векторов a(1;−2) и b(3;4) равно:
Back
-5
4.
FLASHCARD QUESTION
Front
Найдите скалярное произведение векторов a(2;3) и b(4;5).
Back
23
5.
FLASHCARD QUESTION
Front
Даны векторы a и b с длинами |a|=3 и |b|=7. Найдите скалярное произведение a⋅b, если известно, что векторы противоположно направлены.
Back
-21
6.
FLASHCARD QUESTION
Front
Скалярное произведение векторов a и b равно произведению их длин и косинуса угла между ними. Это выражается формулой:
Back
a⋅b = |a| |b| cos(θ)
7.
FLASHCARD QUESTION
Front
Какое значение имеет скалярное произведение векторов, если они сонаправлены?
Back
Положительное значение.
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