Express, “The difference of a real number and itself is zero” usin – McqOptions

MCQOPTIONS

1.	Express, “The difference of a real number and itself is zero” using required operators.
A.	∀x(x − x! = 0)
B.	∀x(x − x = 0)
C.	∀x∀y(x − y = 0)
D.	∃x(x − x = 0)
Answer» C. ∀x∀y(x − y = 0)

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