Respuesta :
Answer:
[tex]a.b = 1[/tex]
Step-by-step explanation:
We are given the following in the question:
[tex]a=2i+j\\b=i-j+k[/tex]
We have to find the dot product.
Formula:
[tex]a = x_1i + x_2j + x_3k\\b = y_1i + y_2j + y_3k\\a.b = x_1y_1 + x_2y_2 + x_3y_3[/tex]
Putting the corresponding values we get,
[tex]a.b = (2.1) + (1.-1) + (0.1)\\= 2-1+0\\=1[/tex]
[tex]a.b = 1[/tex]
Answer:
A.B=1
Step-by-step explanation:
A.B= AxBx+AyBy+AzBz
=(2 x 1)+(1 x -1)+(0 x 1)
= 2-1
=1
