Question

Ex 4 dau coroana!!!!

Answer 1

Răspuns:

Explicație pas cu pas:

a) 4(x-1)/(9(x-1)(x+1)) = 4/9*1/(x+1)

lim x->1 (4/9*1/(x+1)) = 4/9*1/(1+1) =4/18 = 2/9

b) ((x-1)(x+1))/((x+1)(x+2)) = (x-1)/(x+2)

lim x -> -1 ((x-1)/(x+2)) = (-2-1)/(-1+2) = -3

c) ((x-2)(x+2))/((x-1)(x-2)) = (x+2)/(x-1)

lim x ->2 ((x+2)/(x-1)) = (2+2)/(2-1) = 4

d) (x(x-3))/((x-3)(x-4)) = x/(x-4)

lim x ->3 (x/(x-4)) = 3/(3-4) = -3

etc.