Question

Let Q(x, y) denote “M + A = 0.” What is the truth value of the quantifications ∃A∀M Q(M, A).

(a) True

(b) False

I got this question in unit test.

I want to ask this question from Logics in chapter The Foundation: Logics and Proofs of Discrete Mathematics

Answer 1

Right option is (b) False

To elaborate: For each A there exist only one M, because there is no real number A such that M + A = 0 for all real numbers M.