limit x mendekati 4 dari x²-16 per akar x - 2.

jawab

limi ( x-> 4)  (x   + 4)(x - 4)/ (√x - 2)

lim ( x-> 4) ( x+ 4)( √x +2)(√x - 2) / (√x - 2)

lim (x -> 4)  (x + 4)(√x + 2)

x   = 4 
limit = (4 + 4)/ (2 +2) = 8/4 = 2