307 Answered Questions for the topic discrete mathematics

10/21/20

#### Set Theory and Lists

If A = {b, {b}, ∅} how would we use list notation to write {B: B ⊆ A and B ≠ ∅} If you could explain what I need to do to solve this that would be much appreciated.

10/16/20

#### Probability questions for discrete mathematics.

1. Let X = {2, 3, 4}. Suppose that m is chosen uniformly at random from X. Then n is chosen uniformly at random from X. Let G be the random variable whose value is gcd(m, n). Let A be the event...
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10/16/20

#### Discrete Maths strong induction question

(1) Prove using strong induction that every integer n > 4 can be written as a sum of two or more prime numbers. (N.B. The prime numbers do not have to be different).

10/14/20

#### for test preparation 💆🏻♀️💆🏻♀️

a bee flies at 6 feet per second directly to a flowerbed from its hive. the beef stays at the flowerbed for 14 minutes and then flies back to the hive at 4 feet per second, it’s away from the hive...
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10/13/20

#### Function questions

Consider a function f : {A, B, C} → {1, 2, 3, 4, 5, 6}. (i) How many different possibilities are there for the range of f? (ii) If you are also told that f is one-to-one, then how many different...
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Discrete Mathematics Discrete Math

10/12/20

#### Discrete Mathematics problem concerning sets

A class of 25 students has options as to which science subjects they study. The options are biology, chemistry, geology and physics. 15 of the 25 students took only two of these sciences, whilst...
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10/11/20

#### Discrete Mathmatics Induction

A proof by mathematical induction is supposed to show that a given property is true for every integer greater than or equal to an initial value. In order for it to be valid, the property must be...
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10/09/20

#### Need some hlp with my discrete math homework summation

Use the summation notation to rewrite the following expression.
(7 − 13) − (7 − 23) + (7 − 33) − (7 − 43) + (7 − 53) − (7 − 63) =
6
k = 1

10/09/20

#### Please help with this question!!!

The cardinality of the set is , while the cardinality of the set is ----------- while the cardinality of the set is--------

Discrete Mathematics Discrete Math

10/06/20

#### Let Q be the partial order relation defined on P(N)×P(N) by (A, B)Q(C, D) if and only if A ⊆ C and D ⊆ B. Is Q a partial order relation? Is Q a total order relation?

discrete mathematics problem

10/04/20

#### Indirect Arg: Contradiction & Contraposition

Consider the following statement.There is no greatest negative real number.Identify which of the following is a negation for the statement and then fill in the blanks to prove the statement by...
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10/04/20

#### Discrete Mathmatics Contradiction & Contraposition

Construct a sieve of Eratosthenes for the numbers from 2 to 100. (Write all the integers from 2 to 100. Cross out all multiples of 2 except 2 itself, then all the multiples of 3 except 3 itself,...
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10/04/20

#### Discrete Mathmatics Contradiction & Contraposition

Consider the following statement.For every integer m, 7m + 4 is not divisible by 7.Construct a proof for the statement by selecting sentences from the following scrambled list and putting them in...
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10/04/20

#### Discrtete Mathmatics Floor and Celing

Use the floor notation to express each of the following.238 div 11238 mod 11

Discrete Mathematics Discrete Math

10/02/20

#### Please help with this question!!!

Let the domain be the set of all people in the world and let be the statement " is good at Maths".Translate the quantified statement into English.

10/02/20

#### Please help with the following math question!!!

Let and and . Which of the following statements is (are) true?(can have many answers)a.)b.)c.)d.)e.)f.) Which of the following statements is (are) true? . Which of the following statements is...
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10/02/20

#### Please help with the power set!!!!

Which of the following is the power set of ? a.) 4b.)c.)d.)e.) ?

10/02/20

#### Please help with the following is a subset!!!

Which of the following is a subset of ?Note: There may be multiple correct answers!a.) b.) c.) d.) e.)

10/02/20

#### Please help with the cardinality of the following set!!!!

What is the cardinality of the following set?(This can have many answers)a.) 0b.) 4c.) 7d.) 3

10/02/20

#### Please help with this question!!!

Consider the set .Which of the following is the corresponding set builder notation for the above set?a.) b.) c.)d.)

09/29/20

#### Please help with logical equivalences!!!

Let and be any given sets. Use set builder notation and logical equivalences to show that .

09/22/20

#### Discrete Math - Permute letters question

How many ways are there to permute the letters in HAPPY?

09/21/20

#### Please help with this question!

In each of the following, decide whether the given quantified statement is true or false (the domain for both and is the set of all real numbers). Provide a brief justification in each...
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09/21/20

#### Please help with this question!

In each of the following, decide whether the given quantified statement is true or false (the domain for both and is the set of all real numbers). Provide a brief justification in each...
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09/21/20

#### Discrete Math Counting Question

How many 10-digit telephone numbers (that is, length-10 sequences with entries from ) are there for which no two adjacent numbers are both even or both odd?I calculated 14400 from 5! * 5! but this...
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