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
What type of number is 3/2
garri49 [273]

Answer:

it is a mixed number the number is 1 1/2

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Can someone’s please help me? (Ignore the work)
Zinaida [17]

Answer:

a^14b^12

Step-by-step explanation:

okay so lets distribute the 2

so you get -a^6b^10 and a^8b^2

add

7 0
3 years ago
How to solve by completing the square
AveGali [126]

https://www.mesacc.edu/~scotz47781/mat120/notes/quad_formula/quad_formula.html

Use this link to help you .

6 0
3 years ago
6.
denpristay [2]

Answer:

15n=135

Step-by-step explanation:

first, you need to know how much of the total amount is the money needed for soccer balls, to find this you take the amount of a soccer ball and multiple it by the amount of people

14×15=210

then you subtract that from the total amount to get the amount spent on jerseys.

345-210=135

to get the amount of each jersey you take 135 and divide by the amount of people

135÷15=9

4 0
3 years ago
An item on sale costs 25% of the original price. If the original price was $40 , what is the sale price?
forsale [732]
It’s ten (I need more Characters)
3 0
3 years ago
Read 2 more answers
Other questions:
  • A department store sold 51 51 shirts one day. All short-sleeved shirts cost $14.00 $ 14.00 each and all long-sleeved shirts cost
    8·1 answer
  • Which is the slope of the line that passes through the points (-2,4 and (5,-1)?
    11·2 answers
  • Seven times the sum of 4 and some number is 42
    14·1 answer
  • A consumer organization estimates that over a​ 1-year period 15​% of cars will need to be repaired​ once, 9​% will need repairs​
    12·1 answer
  • What is -282 -20,320 written out
    11·2 answers
  • The mass of Parcel A was 0.7kg. Parcel B was heavier than Parcel A. Parcel C had the same mass as Parcel B. The total mass of th
    8·1 answer
  • What is the answer to 2x3x42dividex3x2
    10·1 answer
  • One interior angle of a parallelogram is 65 degrees . If the remaining angles have measures of a,b and c, what is the value of a
    5·1 answer
  • Which one? Please be honest.
    6·1 answer
  • If the volume of the right prism shown is 27 ft3, then h = __feet.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!