Предмет: Геометрия, автор: babiclila07

Знайдіть скалярний добуток векторів a I b якщо: a(2:3) b(-1; 4). a(-2,1). b(4:2)​

Ответы

Автор ответа: wfghostt27
1

Ответ:

10

-6

Объяснение:

а→(2;3) і b→(-1;4), то a→⋅b→=2⋅(-1)+3⋅4 = -2+12=10

a→(-2;1) і b→(4;2), то a→⋅b→=-2⋅4+1⋅2= -8+2=-6

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