damianoscar120 damianoscar120

12-06-2018
Mathematics

contestada

Find a • b.

a = 4i + 8j, b = -2i + 3j

<2, 11>
32
<-8, 24>
16

Respuesta :

chudung1976 chudung1976

13-06-2018

That is about coordinates and the dot product
we have a has coordinates (4;8)
and b has coordinates (-2;3)
So we have a.b= 4x(-2)+ 8x3= -8+24=16
The answer is 16

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