lim x → 1 (x-1) (x^2 + x +1) /x^3 - 1

Lim (x-1)(x²+x+1)/x³-1
x >> 1
= x³+x²-x-x²+x-1/x³-1
= x³-1/x³-1
Memakai rumus turunan: f(x) = n.ax^n-1
Lim x³-1/x³-1
x >> 1
= 3.1x³¯¹/3.1x³¯¹
= 3x²/3x²
Masukan x >> 1
= 3(1)²/3(1)²
= 3/3
= 1

Jadi hasilnya adalah 1

Semoga membantu.