Knowee
Questions
Features
Study Tools

Let Q(x) be the statement “x+1>2x”. If the domain consists of all integers, what are these truth values? a) Q(1) b) ∃xQ(x) c) ∀xQ(x) d) ∃x¬Q(x) e) ∀x¬Q(x)

Question

Let Q(x) be the statement “x + 1 > 2x”. If the domain consists of all integers, what are these truth values?

a) Q(1)
b) ∃x Q(x)
c) ∀x Q(x)
d) ∃x ¬Q(x)
e) ∀x ¬Q(x)

🧐 Not the exact question you are looking for?Go ask a question

Solution

a) Q(1) translates to "1+1>2*1" which simplifies to "2>2". This statement is false.

b) ∃xQ(x) translates to "There exists an x such that x+1>2x". This statement is true for negative integers and zero. For example, if x=-1, the inequality becomes "-1+1 > 2*-1" which simplifies to "0 > -2". This statement is true.

c) ∀xQ(x) translates to "For all x, x+1>2x". This statement is false because it is not true for all integers. For example, if x=2, the inequality becomes "2+1 > 2*2" which simplifies to "3 > 4". This statement is false.

d) ∃x¬Q(x) translates to "There exists an x such that not (x+1>2x)". This statement is true because there are integers for which x+1 is not greater than 2x. For example, if x=2, the inequality becomes "2+1 > 2*2" which simplifies to "3 > 4". This statement is false, so the negation is true.

e) ∀x¬Q(x) translates to "For all x, not (x+1>2x)". This statement is false because there are integers for which x+1 is greater than 2x. For example, if x=-1, the inequality becomes "-1+1 > 2*-1" which simplifies to "0 > -2". This statement is true, so the negation is false.

This problem has been solved

Similar Questions

Let Q(x) be the statement “x+1>2x”. If the domain consists of all integers, what are these truth values? a) Q(1) b) ∃xQ(x) c) ∀xQ(x) d) ∃x¬Q(x) e) ∀x¬Q(x)

What are the truth values of these statements? a) ∃!xP(x)→∃xP(x) b) ∀x P(x) → ∃!xP(x) c) ∃!x¬P(x)→¬∀xP(x)

Determine the truth values of the following propositions. Explain.a) ∅ ∈ {1}b) {1} ∈ {1}c) {1} ⊂ {1}d) {1} ∈ {1, {1}}e) {1} ⊆ {1, {1}}f) {{1}} ∈ 𝒫({1, {1}})

1. {x: x is an integer neither positive nor negative} is ________a) Empty setb) Non-empty setc) Finite setd) Non- empty and Finite set

Which of these values can a boolean variable contain?Options0 & 1true & falseAny integer valuetrue

1/1

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.