Limit Tak hingga (1-2x)^3/(x-1) (2x^2 + x +1)

lim x→∞ (-8x³ + 12x² - 6x + 1)/(2x³ - x² - 1)
masing² dibagi pangkat trtinggi x³
= (-8 + 12/x - 6/x² + 1/x³)/(2 - 1/x - 1/x³)
= (-8 + 0 - 0 + 0)/(2 - 0 - 0)
= -4