Seekor lalat terbang dengan persamaan posisi r(t)=((6t−4t2)i−(7+8t2)j)r\left(t\right)=\left(\left(6t-4t^2\right)i-\left(7+8t^2\right)j\right)r(t)=((6t−4t2)i−(7+8t2)j) m. Persamaan kecepatan terhadap waktu adalah ... m/s.
v(t)=(2t3−t)i−(7t−16t2)jv\left(t\right)=\left(2t^3-t\right)i-\left(7t-16t^2\right)jv(t)=(2t3−t)i−(7t−16t2)j
v(t)=(6−8t)i−16t jv\left(t\right)=\left(6-8t\right)i-16t\ jv(t)=(6−8t)i−16t j
v(t)=2t i−15t jv\left(t\right)=2t\ i-15t\ jv(t)=2t i−15t j
v(t)=(6−4t)i+8t jv\left(t\right)=\left(6-4t\right)i+8t\ jv(t)=(6−4t)i+8t j
v(t)=(3t2−8t3)i−20t jv\left(t\right)=\left(3t^2-8t^3\right)i-20t\ jv(t)=(3t2−8t3)i−20t j