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
one evening 1500 concert tickets were sold for the Jazz Fest. Tickets cost $30 for covered pavillion seats and $10 for lawn seat
snow_lady [41]
x-number\ of\ tickets\ for\ pavilion\\1500-x-number\ of\ tickets\ for\ lawn\\\\30x+10(1500-x)=27000\\30x+15000-10x=27000\\30x-10x=27000-15000\\20x=12000\ \ \ \ \ \ \ \ |:20\\\\x=600\\1500-600=900
6 0
3 years ago
If you have 15 blocks and divide the blocks equally among 5 friends, how many blocks does each friend receive?
vaieri [72.5K]

Answer:

3

Step-by-step explanation:

15 divided by 5 equals 3.

4 0
3 years ago
Read 2 more answers
What is 100,000,000 written as a power of ten?<br> a. 10^8<br> b. 10^9<br> c. 10^10<br> d. 10^11
Minchanka [31]
100,000,000 = 100 \times 10^6 = 1\times 10^8\\~~\underbrace{~~~~~~~~~~~~~~~}\\~~~~~~~~~8

Your answer is a. 10^8
7 0
3 years ago
Find the missing angle measure. Then classify the triangle by its angles.
zalisa [80]

Answer:

b

Step-by-step explanation:

5 0
3 years ago
In science class, Jada uses a graduated cylinder with water in it to measure the volume of some marbles. After dropping in 4 mar
Monica [59]

Answer:

1. 0.17 because ur mom

2. 9.52 cus im better

3. 11.53 cus ur trash

4. yes cus constant rate of change

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • Please answer correctly !!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!
    11·1 answer
  • Two angles in a triangle have measures of 62 degrees and 15 degrees. What is the measure of the third angle.
    15·2 answers
  • If a baking tray is 500mm by 700mm, how many of 25cm in diameter can fit into the  oven
    13·2 answers
  • X is directly proportional with Y write an equation that shows the relationship if y equals 6 and x equals one
    14·1 answer
  • 3 3/5 x (-8 1/3) please answer this question
    15·1 answer
  • 3 times negative 13/8
    8·2 answers
  • Express 40% as a fraction in simplest form
    12·1 answer
  • A circular pizza with a diameter of 8 inches. The pizza is in a square box with side lengths of 8 inches. In square inches, how
    8·1 answer
  • You start at (-1, 4). You move left 4 units and down 3 units. Where do you end?
    10·2 answers
  • Answer question b......
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!