Question

Dado os vetores u = (-5,2,3) e v = (-2, -1, -1),determine u + 3v:

Answer 1

$\mathbf{u}=\left(-5,\,2,\,3 \right ),\;\;\;\mathbf{v}=\left(-2,\,-1,\,-1 \right )$


$\mathbf{u}+3\mathbf{v}=\left(-5,\,2,\,3 \right )+3\left(-2,\,-1,\,-1 \right )\\ \\ \mathbf{u}+3\mathbf{v}=\left(-5,\,2,\,3 \right )+\left(-6,\,-3,\,-3 \right )\\ \\ \mathbf{u}+3\mathbf{v}=\left(-5-6,\,2-3,\,3-3 \right )\\ \\ \boxed{\mathbf{u}+3\mathbf{v}=\left(-11,\,-1,\,0 \right )}$