Question

given vector v = <-3, -4>, find -2v. answer attempt 1 out of 2 answer: < > submit answer

Explanation:

Step1: Recall scalar - vector multiplication rule

Multiply each component of vector $\mathbf{v}$ by the scalar.
If $\mathbf{v}=\langle a,b
angle$ and $k$ is a scalar, then $k\mathbf{v}=\langle ka,kb
angle$. Here $\mathbf{v}=\langle - 3,-4
angle$ and $k = - 2$.

Step2: Calculate the first component

Multiply the first component of $\mathbf{v}$ by $-2$.
$-2\times(-3)=6$.

Step3: Calculate the second component

Multiply the second component of $\mathbf{v}$ by $-2$.
$-2\times(-4)=8$.

Answer:

$\langle6,8
angle$