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Verified answer
V = 3t^2-5t+4t = 2 detik
V = 3(2)^2-5(2)+4
V = 3(4)-10+4
V = 12-10+4
V1 = 6m/s
t = 3detik
V = 3(3)^2-5(3)+4
V = 3(9)-15+4
V = 27-15+4
V2 = 16m/s
a = V2-V1/t
a = 16-6/1
a = 10/1
a = 10m/s^2