Respostas

2014-01-29T09:50:37-02:00
(x+2)/(x-1) = -2
x+2 = -2.(x-1)
x+2 = -2x+2
x = -2x --> x = 0

(x+2)/(x-1) = 2
x+2 = 2.(x-1)
x+2 = 2x-2
x-2x = -2-2
-x = -4 .(-1)
x = 4

(x+2)/(x-1) = 4
x+2 = 4.(x-1)
x+2 = 4x-4
x-4x = -2-4
-3x = -6 .(-1)
3x = 6
x = 6/3
x = 2

D:{0,2,4}
3 3 3