Find the indicated vector.
-Let $\mathbf { a } = 3 \mathbf { i } , \mathbf { b } = \mathbf { i } + \mathbf { j }$. Find $3 \mathbf { a } + \mathbf { b }$.
A) $\mathbf { i } + 10 \mathbf { j }$
B) $10 \mathbf { i } + 3 \mathbf { j }$
C) $11 \mathrm { i } + \mathbf { j }$
D) $10 \mathbf { i } + \mathbf { j }$

Question

Quizplus · Accepted Answer

First, calculate $3\mathbf{a} = 3 \times 3\mathbf{i} = 9\mathbf{i}$. Then, add $\mathbf{b} = \mathbf{i} + \mathbf{j}$ to get $9\mathbf{i} + \mathbf{i} + \mathbf{j} = 10\mathbf{i} + \mathbf{j}$.

Find the Indicated Vector a=3i,b=i+j\mathbf { a } = 3 \mathbf { i } , \mathbf { b } = \mathbf { i } + \mathbf { j }a=3i,b=i+j

Find the Indicated Vector $\mathbf { a } = 3 \mathbf { i } , \mathbf { b } = \mathbf { i } + \mathbf { j }$