1.
Quais são os números naturais?
Correct Answer
B. São os inteiros e positivos, incluindo o zero
Explanation
The correct answer is "São os inteiros e positivos, incluindo o zero". This answer states that natural numbers include all positive integers and zero.
2.
Qual a letra que representa o conjunto dos números inteiros?
Correct Answer
C. Z
Explanation
The letter "Z" represents the set of integers. In mathematics, the set of integers includes all positive and negative whole numbers, as well as zero. The letter "Z" is derived from the German word "Zahlen," which means numbers. Therefore, "Z" is the correct answer to represent the set of integers.
3.
Qual é o conjunto constituído somente pelos números inteiros, decimais, frações e dízimas periódicas?
Correct Answer
C. Os racionais
Explanation
The correct answer is "Os racionais" (The rationals). This is because the set of rational numbers includes integers, decimals, fractions, and periodic decimals. Rational numbers can be expressed as a ratio of two integers, where the denominator is not zero. These numbers can be written as terminating decimals or repeating decimals. Therefore, the set of rational numbers includes all the mentioned types of numbers.
4.
Qual o conjunto de números representado pela letra Q?
Correct Answer
A. Racionais
Explanation
A letra Q representa o conjunto dos números racionais. Os números racionais são aqueles que podem ser expressos como uma fração, onde o numerador e o denominador são números inteiros e o denominador não é zero. Isso inclui todos os números inteiros, números decimais finitos e números decimais periódicos. Portanto, a resposta correta é Racionais.
5.
Em relação aos principais conjuntos numéricos, é CORRETO afirmar que
Correct Answer
A. Todo número natural é inteiro
Explanation
The correct answer states that every natural number is an integer. This is true because the set of natural numbers includes all positive whole numbers (1, 2, 3, etc.), and since integers include both positive and negative whole numbers (..., -3, -2, -1, 0, 1, 2, 3, ...), every natural number is also an integer.
6.
TODO NÚMERO INTEIRO POSSUI, ALÉM DOS DIVISORES POSITIVOS , OS DIVISORES NEGATIVOS:
Correct Answer
B. False
Explanation
The statement is false because a positive integer only has positive divisors. Negative divisors are not applicable to positive integers.
7.
TODO NÚMERO RACIONAL É INTEIRO:
Correct Answer
B. False
Explanation
The given statement is false. A rational number is a number that can be expressed as a fraction, where both the numerator and denominator are integers. However, not all rational numbers are integers. Integers are a subset of rational numbers that include whole numbers and their negatives, but rational numbers can also include fractions and decimals. Therefore, not all rational numbers are integers.
8.
TODO NÚMERO NATURAL É INTEIRO:
Correct Answer
A. True
Explanation
A natural number is a positive integer greater than zero. Since integers include both positive and negative whole numbers, and natural numbers are a subset of integers, it is correct to say that a natural number is an integer. Therefore, the answer "True" is correct.
9.
O NÚMERO ZERO É RACIONAL
Correct Answer
A. True
Explanation
The statement "O número zero é racional" translates to "The number zero is rational" in English. This statement is true because zero can be expressed as a fraction, specifically 0/1, which satisfies the definition of a rational number.
10.
Qualquer número negativo é MENOR que qualquer número positivo;
Correct Answer
A. True
Explanation
Any negative number is less than any positive number because negative numbers are to the left of zero on the number line and positive numbers are to the right of zero. Therefore, the statement "Any negative number is less than any positive number" is true.
11.
-3,-2,-1,0 É O CONJUNTO DOS NÚMEROS INTEIROS NÃO POSITIVOS:
Correct Answer
B. False
Explanation
The given statement is false. The set of non-positive integers includes all the negative integers and zero. However, the given set (-3, -2, -1, 0) includes only the negative integers and does not include zero. Therefore, it is not the set of non-positive integers.
12.
MARQUE AS ALTERNATIVAS CORRETAS:
Correct Answer(s)
A. TODO NÚMERO INTEIRO É NATURAL
D. TODO NÚMERO FRACIONÁRIO É RACIONAL
Explanation
The correct answer is "TODO NÚMERO INTEIRO É NATURAL, TODO NÚMERO FRACIONÁRIO É RACIONAL." This answer states that every whole number is a natural number, and every fractional number is a rational number. It implies that the set of whole numbers is a subset of the set of natural numbers, and the set of fractional numbers is a subset of the set of rational numbers.
13.
CONCEITUE E CITE EXEMPLOS : NÚMEROS NATURAIS, NÚMEROS INTEIROS E NÚMEROS RACIONAIS.
14.
Sendo A=[1;4] e B=]-1;2], determine:AUB
15.
SE A = { 1,3,7,4,9,12,14}, B= {2,15,16,18,1,9} e c = { 1,4,6,8,10,12} . Determine:
A U B , A U C , B U C ,BUA