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aplicamos la tabla de valores
y = x+2
x l y
0 l 2
1 l 3
-1 l 1
2 l 4
-2 l 0
3 l 5
-3 l -1
4 l 6
-4 l -2
R = { (0,2) ; (1,3);(-1,1) ; (2,4); (-2,0) ; (3,5) , ;(-3,-1).......}
D(dominio) = { 0,1,-1,2,-2,3,-3,4,-4............ }
todos los numeros reales
R(rango) = { 0,1,-1,2,-2,3,-3,4,-4.............}
todos los numeros reales
Saludos