Rejea kifungu hapa chini na kisha jibu swali baadaye katika lugha ile ile kama kifungu: Passage: {\displaystyle {\dot {\mathbf {x} }}(t) =A(t) \mathbf {x} (t) +B(t) \mathbf {u} (t) +\mathbf {v} (t),} Swali: Ni barua gani kati ya (?)
t ya