Use the vector $\mathbf { u } = \langle 3,2 \rangle$ to find the indicated quantity.State whether the result is a vector or a scalar. $\mathbf { u } ^\mathbf{.}\mathbf { u } ^ { }$
A) $\langle 13,15 \rangle$ ;vector
B)15;scalar
C)13;scalar
D)11;scalar
E) $\langle 17,9 \rangle$ ;vector

Question

Use the vector $\mathbf { u } = \langle 3,2 \rangle$ to find the indicated quantity.State whether the result is a vector or a scalar.​ $\mathbf { u } ^\mathbf{.}\mathbf { u } ^ {  }$ ​
A) $\langle 13,15 \rangle$ ;vector
B)15;scalar
C)13;scalar
D)11;scalar
E) $\langle 17,9 \rangle$ ;vector

Quizplus · Accepted Answer

The dot product of a vector with itself is calculated as $3^2 + 2^2 = 9 + 4 = 13$, which is a scalar.

Use the Vector u=⟨3,2⟩\mathbf { u } = \langle 3,2 \rangleu=⟨3,2⟩

Use the Vector $\mathbf { u } = \langle 3,2 \rangle$