538 Answered Questions for the topic discrete math

Discrete Math

10d

#### Discrete Mathematics

How do I get the solution to...Let A={-1,0,2,4,7}. Find f(A) if ?a) f(x)=1b) f(x)= 2x+1c) f(x)=[x/5]d) f(x)=[(x^2+1)/3]

Discrete Math

12d

#### discrete maths direct proof

16. Prove that if a and b are positive integers, then a/b + b/a ≥ 2.

Discrete Math

13d

#### Use iteration to guess an explicit formula for the sequence and use mathematical induction to verify the formula obtained:

Pk = Pk-1 + 2 * 3k, for each integer K ≥ 2, where Pk = 2

Discrete Math

14d

#### I. Use mathematical induction, a basis proof, a inductive hypothesis and step to solve:

∀n ∈ N, ∑n i=1 i!(i2 + 1) = (n + 1)!n.II. Give a recursive definition for the set of all strings of 0's and 1's for which all the 0s follow all the 1s.

Discrete Math Discrete Mathematics

16d

#### Use laws of logical equivalence to simplify the circuit. Justify each step. ((𝑃 ∧ ~𝑄) ∨ (𝑃 ∧ 𝑄)) ∧ Q

Use laws of logical equivalence to simplify the circuit. Justify each step. ((𝑃 ∧ ~𝑄) ∨ (𝑃 ∧ 𝑄)) ∧ Q

Discrete Math Discrete Mathematics

16d

#### Write the statements formally using quantifiers and variables. Make them conditional.

Write the statements formally using quantifiers and variables. Make them conditional.
a) A sufficient condition for an integer to be divisible by 8 is that it be divisible by 16.
b) If a product...
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Discrete Math

21d

#### Given a set (in Description below), what are the range and domain of g?

Let X be the set {1, 2, 5, 6, 7} and Y be the set {7, 3, 9, 8, 6}. Unary function f : X→Y Binary function g : X ×Y →YWhat are the range and domain of g?

21d

#### If A is a countable set, how can i show that A has countably many finite subsets?

Lets say that A is a countable set. How would I go about showing that A has countably many finite subsets? I need to show that for every n ∈ N, the set Pn(A) of finite subsets - with exactly n...
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Discrete Math

28d

#### Find a7 if a1=-7 and d=5

Discrete Math Discrete Mathematics

29d

#### Use laws of logical equivalence to verify the logical equivalence for the statements

Use laws of logical equivalence to verify the logical equivalence for the statements. (do not use truth tables!) Justify each step:𝑝 → 𝑞 ∨ 𝑟 ≡ 𝑝 ∧ ~𝑞 → rPlease show me every step and explain it so...
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Discrete Math Discrete Mathematics

29d

#### negation of the following compounded statement:

Write the negation of the following compounded statement:
𝑥 ≤ 20 or 𝑥 > 30 (where 𝑥 is some real number).
−1 < 𝑥 ≤ 9

Discrete Math

01/25/21

#### Prove that the algorithm shown above for computing n! when n is a non-negative integer is correct.

procedure factorial(n: nonnegative integer)if n=0 then return 1else return n . factorial(n-1){output is n!}

Discrete Math

01/25/21

#### Trace algorithm shown above when it finds gcd(13,20). That is, show all the steps used by the algorithm shown above to find gcd(13,20).

1. Trace algorithm shown above when it finds gcd(13 ,20). That is, show all the steps used by the algorithm shown above to find gcd(13 ,20).procedure gcd(a ,b nonnegative integers with...
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Discrete Math Discrete Mathematics

01/22/21

#### Find the truth value of the statement

Determine the truth-values of the following statements. Explain your reason.a) The product 6 ∗ 5 = 25 or 6 is odd b) If we are in the month of January then 3+9 =12 c) 5 is a letter iff T is a vowel

01/21/21

#### Probability Question

A) A card is drawn at random from a well shuffled pack of 52 cards. What is the probability that the card is neither a spade nor a Jack? B) Six friends Aisha, Bilal, Kamran, Danish, Emaan and...
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01/19/21

#### what is the original message (number)encrypted using the RSA system with n= 77 and e = 43 if the encrypted message is 0202

what is the original message (number)encrypted using the RSA system with n= 77 and e = 43 if the encrypted message is 0202...............................need solution with explinations

Discrete Math

01/17/21

#### A ternary string is a string made up of 0's,1's and 2's. How many ternary strings of length 8 are there?

Discrete Math

01/15/21

#### three ounces of bluefish baked with butter or maragarine provide 22 grams of protein. how many ounces would provide 242 grams

01/13/21

#### Translate each statement into words

0 ∉ Z+∄x ∈ Q such that x2 = 2∀𝑥 ∈ R, ∃ a ∈ R such that a < x

Discrete Math

01/02/21

#### group theory question

Decide which of the following binary structures are groups. For each, if the binary structure isn't a group, prove that. If the binary structure is a group, prove thata) (1/2 Z,+) where1/2 Z ={n/2...
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