Question

Urgentee
28. Represente, na reta real, os intervalos:
a) [0, +∝[
b) {x ∉ R}
c) {x ∈ R / 1 < x < 9}
d) {x ∈ R / –2 ≤ x < 2}
e) {x ∈ R / –4 ≤ x ≤ –1}
f) {x ∈ R / x ≠ 2/3}

Answer 1

a) [0, α[
.......0______(α).......

b) {x ∉ R}
-∞.......................+∞

c) {x ∈ R | 1 < x < 9}
.......(1)_____(9).......

d) {x ∈ R | -2 ≤ x < 2}
.......-2_____(2).......

e) {x ∈ R | -4 ≤ x ≤ -1}
.......-4_____-1.......

f) {x ∈ R | x ≠ 2/3}
-∞______(2/3)___+∞

( ) intervalo aberto, ou seja, não pertence a reta.

Espero ajudar... (: