Find the indicated vector.
-Let $\mathbf { u } = 3 i , \mathbf { v } = \mathbf { i } + \mathrm { j }$. Find $2 \mathbf { u } - \mathbf { v }$.
A) $5 \mathbf { i } - 2 \mathbf { j }$
B) $\mathbf { i } - 5 \mathbf { j }$
C) $11 \mathbf { i } + \mathbf { j }$
D) $5 \mathbf { i } - \mathbf { j }$

Question

Quizplus · Accepted Answer

First, multiply $\mathbf{u}$ by 2, resulting in $6\mathbf{i}$. Then, subtract $\mathbf{v}$ ($\mathbf{i} + \mathbf{j}$) from $6\mathbf{i}$ to get $5\mathbf{i} - \mathbf{j}$.

Find the Indicated Vector u=3i,v=i+j\mathbf { u } = 3 i , \mathbf { v } = \mathbf { i } + \mathrm { j }u=3i,v=i+j

Find the Indicated Vector $\mathbf { u } = 3 i , \mathbf { v } = \mathbf { i } + \mathrm { j }$