Question

What is the dot product of `<7,-8,1>` and `<4,-6,3 >`?

Answer 1

`A.B=28+48+3=79`

Explanation:

`A=7x-8y+z`
`B=4x-6y+3z`
`A.B=A_x*B_x+A_y*B_y+A_z*B_z`
`A.B=7*4+((-8)*(-6))+1*3`
`A.B=28+(+48)+3`
`A.B=28+48+3=79`