Answer each of the following questions.
Is the set of rational numbers closed under addition? Explain.
정답·풀이 보기 (영어 원문)
The set of rational numbers is closed under addition since .
문제 은행 · 기초 수학 · 공통수학2 · 집합과 명제
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459문제 · 2 / 23쪽
Answer each of the following questions.
Is the set of rational numbers closed under addition? Explain.
The set of rational numbers is closed under addition since .
Answer each of the following questions.
Is the set of integers closed under division? Explain.
The set of integers is not closed under division. For example, is not an integer.
Answer each of the following questions.
Is the set of rational numbers closed under subtraction? Explain.
The set of rational numbers is closed under subtraction since .
Which of the following sentences are statements?
.
This is a statement.
Which of the following sentences are statements?
.
This is not a statement.
Which of the following sentences are statements?
There exist integers , , and such that .
This is a statement.
Which of the following sentences are statements?
If , then .
This is not a statement.
Which of the following sentences are statements?
For each real number , if , then .
This is a statement.
Which of the following sentences are statements?
For each real number , .
This is a statement.
Which of the following sentences are statements?
.
This is not a statement.
Which of the following sentences are statements?
If is a prime number, then has three positive factors.
This is a statement if we are assuming that is a prime number means that is a natural number.
Which of the following sentences are statements?
.
This is not a statement.
Which of the following sentences are statements?
Every rectangle is a parallelogram.
This is a statement.
Which of the following sentences are statements?
Every even natural number greater than or equal to 4 is the sum of two prime numbers.
This is a statement.
Identify the hypothesis and the conclusion for each of the following conditional statements.
If is a prime number, then has three positive factors.
Hypothesis: is a prime number.
Conclusion: has three positive divisors.
Identify the hypothesis and the conclusion for each of the following conditional statements.
If is an irrational number and is an irrational number, then is an irrational number.
Hypothesis: is an irrational number and is an irrational number.
Conclusion: is an irrational number.
Identify the hypothesis and the conclusion for each of the following conditional statements.
If is a prime number, then or is an odd number.
Hypothesis: is a prime number
Conclusion: or is an odd number.
Identify the hypothesis and the conclusion for each of the following conditional statements.
If is a prime number and , then is an odd number.
Hypothesis: is a prime number and .
Conclusion: is an odd number.
Identify the hypothesis and the conclusion for each of the following conditional statements.
If and is an even number, then is not prime.
Hypothesis: and is an even number.
Conclusion: is not prime.
Determine whether each of the following conditional statements is true or false.
If , then .
This statement is true.