Solución
a
(
t
)
=
⟨
−
2
2
,
−
2
,
0
⟩
\bold{a}(t)=\bigg\lang −\frac{\sqrt{2}}{2},−\sqrt{2},0\bigg\rang
a
(
t
)
=
⟨
−
2
2
,
−
2
,
0
⟩