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8 = x³
2³ = x³
x= 2 berarti titik koordinatnya adalah (2,8)
m = 3x² , x = 2
m = 3(2)² = 12
persamaan grs singgung y - y1 = m(x - x1)
y - 8 = 12(x - 2)
y = 12x - 24 + 8
y =12x - 16