December 2019 1 46 Report
Suatu sepeda motor bergerak dengan persamaan jarak s = f(t) = 5t²+2t-1 (dalam km). kecepatan sepeda motor tersebut pada saat t = 5 jam adalah.....
A. 52 km/jam
B. 50 km/jam
C. 48 km/jam
D. 27 km/jam
E. 26 km/jam

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