Question

represente na forma algebrica os intervalos: a) [-2,4] b) ]9,10] c)]∞ ,8} d)]-1,∞ [

Answer 1

Represente na forma algebrica os intervalos: 
a) [-2,4] ==> x∈R  / - 2 < x ≤ 4 
b) ]9,10] ==> x∈R  / 9 < x ≤  10
c)]∞ ,8} ==> x∈R /  - ∞ < x < 8 
d)]-1,∞ [ ==> x∈R /  - 1 < x < ∞