lim x mendekati 7 x kuadrat - 11x+28/x-7

lim (x²-11x+28) / (x-7)

pembilang difaktorkan dulu.
jadi 

= lim (x-7)(x-4) / (x-7)
= lim (x-4)

subtitusikan 7 ke x
= 7-4
= 3

Lim      (7x² - 11x + 28)/(x - 7)
x → 7 

Jwb:
(7x² - 11x + 28)/(x - 7)
= (x-7)(x-4)/(x-7) --------------->> (coret "x - 7")
= x - 4 ------------->> (masukkan nilai "x→7")
= 7 - 4
= 3