
MathEnjoy - 9ºano - Intervalos de números reais
Authored by Professor Prof
Mathematics
9th Grade
Used 23+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Considera o conjunto X = [−2,1[ ∩ ℤ , ℤ é o conjunto dos números inteiros relativos.
Qual dos conjuntos seguintes é igual a X ?
{−2, − 1}
{−2, − 1, 0}
{−1, 0, 1}
{−2, − 1, 0, 1}
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual dos conjuntos seguintes é igual ao conjunto ] −1; 2,25 ] ∩ [√ 5; 3[
[2,25; 3[
]-1; 3[
]√ 5; 2,25]
[√ 5; 2,25]
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Considera os intervalos de números reais A = [0, 4[ e B = [3, + ∞[.
Qual dos intervalos seguintes é igual ao conjunto A ∩ B ?
[0, 3]
[0, + ∞[
[3, 4[
]4, +∞[
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual dos conjuntos seguintes é igual ao conjunto ]0,3[ ∪ ]2,5[ ?
]0,5[
]0,2[
]2,3[
]3,5[
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Considera o conjunto A =] − π, −1].
Qual das seguintes afirmações é verdadeira?
−3,15 ∈ A
−π ∈ A
π ∈ A
−3,14 ∈ A
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual dos números seguintes pertence ao conjunto A =] − ∞, 0[ ∪ ]2,3]?
0
1
3
4
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Qual é o menor número inteiro que pertence ao intervalo [−π,0]?
−4
−π
−3
0
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