Kak tolong bantu tugas ini.. Tentang Limit...

1) limit (4 - x) / (2 - Vx)
= limit (2^2 - Vx^2 ) / (2 - Vx)
= limit (2 -Vx) (2 + Vx) / (2 - Vx)
= limit (2 + Vx)
= 2 + V4
= 2 + 2
= 4
2) limit (2x^2 - x - 1) / (3x^2 - 2x - 1)
= limit (x - 1)(2x + 1) / (x - 1)(3x +1)
= limit (2x + 1) / (3x + 1)
= (2.1 + 1) / (3.1 + 1)
= (2 + 1) / (3 + 1)
= 3/4
3) limit ( 3x^2 - 5x - 12)/ (x^2 - 9)
= limit (x -3)(3x +4) / (x -3)(x + 3)
= limit (3x + 4)/(x + 3)
= (3.3 + 4) / (3 + 3)
= 13/6
= 2 1/6
4) limit (x + Vx) / Vx
= limit Vx(Vx + 1) / Vx
= limit (Vx + 1)
= V0 + 1
= 1