Compute the dot product u · v.
-$$\mathbf { u } = \left[ \begin{array} { r }
5 \
15
\end{array} \right] , \mathbf { v } = \left[ \begin{array} { r }
6 \
15
\end{array} \right]$$
A) 255
B) 30
C) 225
D) $- 195$

Question

Compute the dot product u · v.
-$$\mathbf { u } = \left[ \begin{array} { r } 
5 \
15
\end{array} \right] , \mathbf { v } = \left[ \begin{array} { r } 
6 \
15
\end{array} \right]$$
A) 255
B) 30
C) 225
D) $- 195$

Quizplus · Accepted Answer

The dot product $ \mathbf{u} \cdot \mathbf{v} $ is computed as $ (5 \times 6) + (15 \times 15) = 30 + 225 = 255 $.

Compute the Dot Product U · V u=[515],v=[615]\mathbf { u } = \left[ \begin{array} { r } 5 \\15\end{array} \right] , \mathbf { v } = \left[ \begin{array} { r } 6 \\15\end{array} \right]u=[515​],v=[615​]

Compute the Dot Product U · V $\mathbf { u } = \left[ \begin{array} { r } 5 \\15\end{array} \right] , \mathbf { v } = \left[ \begin{array} { r } 6 \\15\end{array} \right]$