Tentukan limit berikut dgn faktorisasi a. lim x-> -2. x^2 - 2x - 8/(per) x + 2 = b. lim x-> -2. x^2 - 4x - 5/(per) x^2 + 7x + 6 =

jawab

lim(x->-2)  (x^2 - 2x - 8)/(x +2)
lim(x-> -2) (x+2)(x - 4)/(x+2)
lim(x->-2) (x -4)  = 2 - 4 = -2


lim(x->-1) (x^2 -4x -5)/ (x^2 +7x +6)
lim(x->-1) (x+1)(x - 5) / (x+1)(x+ 6)
lim(x->-1) (x-5)./(x+6)  = (-1-5)/(-1+6)= -6/5