Math Problem Statement

Determine the truth of the following statement for real numbers x and y: ∀x∃y(x + y = 3)

Solution

The task in the image involves mathematical logic and asks to determine the truth value of a statement in the form of:

xy(x+y=3)\forall x \exists y (x + y = 3)

Where xx and yy are real numbers.

Step-by-step breakdown:

  1. Universal Quantifier (x\forall x): The statement claims that for every real number xx, there exists a real number yy such that the equation x+y=3x + y = 3 holds.

  2. Existential Quantifier (y\exists y): For each xx, we need to find at least one yy such that the sum of xx and yy equals 3.

  3. Solving the equation: The equation x+y=3x + y = 3 can be rearranged to find yy: y=3xy = 3 - x For each real number xx, there is a corresponding yy (namely y=3xy = 3 - x) that satisfies this equation.

Conclusion:

Since for every real number xx, we can find a real number y=3xy = 3 - x, the statement is true.

Would you like further details or explanations on any part of this?

Here are 5 related questions you might find interesting:

  1. What is the difference between universal and existential quantifiers in logic?
  2. How do quantifiers change the truth value of logical statements?
  3. Can you give an example of a false statement with quantifiers?
  4. What are the applications of predicate logic in computer science?
  5. How does mathematical logic relate to set theory?

Tip: When working with quantifiers, always check if the variable can satisfy the condition for all (universal quantifier) or at least one (existential quantifier) cases.

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Math Problem Analysis

Mathematical Concepts

Mathematical Logic
Quantifiers
Algebra

Formulas

x + y = 3
y = 3 - x

Theorems

Universal and Existential Quantifiers

Suitable Grade Level

Grades 10-12