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r = 4t²i - (6t² + 2t)j - (4t³ - 1)k
kecepatan:
v = dr/dt (turunan)
v = 8ti - (12t + 2)j - 12t²k
percepatan:
a = dv/dt (turunan)
a = 8i - 12j - 24tk
t = 1 sekon
a (1) = 0i - 0j - 24(1)k
a = 24