1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Papessa [141]
3 years ago
10

Let D = E = {−2, −1, 0, 1, 2} Write negations for each of the following statements and determine which is true, the given statem

ent or its negation. a. ∀x ∈ D, ∃y ∈ E such that x + y = 1. b ∃x ∈ D such that ∀y ∈ E, x + y = y. c. ∀x ∈ D, ∃y ∈ E such that xy ≥ y. d. ∃x ∈ D such that ∀y ∈ E, x ≤ y.
Mathematics
1 answer:
vfiekz [6]3 years ago
5 0

Answer:

See explanation below.

Step-by-step explanation:

We use laws of quantifiers to write the negations. The negation of ∀w∃zP(w,z) is ∃w∀z¬P(w,z). The negation of ∃w∀zP(w,z) is ∀w∃z¬P(w,z), for a predicate P depending on w and z.  

a) Negation: ∃x ∈ D, such that ∀y ∈ E, x + y ≠ 1. In this case the negation is true, hence the original statement is false. Take x=-2∈D, and note that x+y≤0 for all y ∈ E. Therefore x+y is never 1.

b) Negation: ∀x ∈ D, ∃y ∈ E such that x + y ≠ y. Here, the original statement is true. Take x=0∈D, then x+y=0+y=y for all y∈E.

c) Negation: ∃x ∈ D, such that ∀y ∈ E, xy < y. In this case, the original statement is true. Given x∈D, take y=x∈E. Hence xy=x²≥x for all x∈D (this inequality is true for integers, and we can check it case by case in D).

d) Negation: ∀x ∈ D, ∃y ∈ E such that x > y. In this case, the original statement is true, take x=-2∈D. Then -2≤y for all y∈E.

You might be interested in
Write the the right answer and how you got to the answer. BEST ANSWER GETS BRAINLIEST
Gala2k [10]
I split it into parts. The small rectangle sticking out is 2x3 which is a 6 and the big rectangle 4x8 which is 32. The triangle is 8x2/2 which is 8. 6+32+8 = 46
6 0
3 years ago
Read 2 more answers
Work out the value of: 5x - 2y when x = 3 and y = 4
KATRIN_1 [288]
The expression is 5x - 2y
Use PEMDAS and work out the rest
x = 3 and y = 4
5 x = 5 x 3 = 15
2 y = 2 x 4 = 8
15( x ) - 8 (y) = 7
The answer is 7

Hope This Helps You!
Good Luck Studying :)
4 0
3 years ago
Read 2 more answers
He drank 2 small bottles and 2 large bottles, for a total of 76 ounces. The day before, he drank 4 small bottles and 1 large bot
AVprozaik [17]

Answer: the small bottle holds 15 ounces while the large bottle holds 23 ounces.

Step-by-step explanation:

Let x represent the number of ounces that a small bottle holds.

Let y represent the number of ounces that a large bottle holds.

He drank 2 small bottles and 2 large bottles, for a total of 76 ounces. It means that

2x + 2y = 76 - - - - - - - - - - - - 1

The day before, he drank 4 small bottles and 1 large bottle, for a total of 83 ounces. This means that

4x + y = 83 - - - - - - - - - - - - -2

Multiplying equation 1 by 2 and equation 2 by 1, it becomes

4x + 4y = 152

4x + y = 83

Subtracting, it becomes

3y = 69

y = 69/3 = 23 ounces

Substituting y = 23 into equation 1, it becomes

2x + 2 × 23 = 76

2x + 46 = 76

2x = 76 - 46 = 30

x = 30/2 = 15 ounces

4 0
3 years ago
Find (7*10 to the sixth power) -
Nat2105 [25]
Do 10 to the sixth power first then multiply that by 7 you use PEMDAS
8 0
3 years ago
Read 2 more answers
What is 884 divided by 3
matrenka [14]

Answer:

294.6666666666667

3 0
2 years ago
Read 2 more answers
Other questions:
  • We call the part or the remaining number in a percent problem the?
    12·1 answer
  • Write these numbers in order starting with the smallest <br> 2.303 , 2.3 , 2.33, 2.03
    14·2 answers
  • What type of relationship does a correlation coefficient of r = 0.45 indicate?
    8·1 answer
  • Find the hcf of 15a²b² and -24ab | plzzz solve
    5·1 answer
  • Two linear functions are shown below. Which function has a greater rate of change?
    13·2 answers
  • Range of scores making up the interquartile ranger
    13·1 answer
  • Using all the rest of my points on this all just here for points answers will be reported
    8·2 answers
  • Use the graph to find the slope.
    9·1 answer
  • Please help I’m really stressed
    5·1 answer
  • Which of the following is equivalent to the radical expression below when
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!