Tolong kak dg caranya ..

Sebenarnya aku tau caranya no yang lain. Tapi lupa rumusnya apa jadi aku jawab no 1 a aja ya…

X(t) = 5t² – 2t + 5
v(t) = dx / dt
v(t) =10t – 2
v(2) = 10(2) – 2 = 20 – 2 = 18 m/s

v(t) = 3t³ – 2t – 4
a(t) = 9t² – 2
a(2) = 9(2²) – 2
a(2) = 36 – 2 = 34 m/s²