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. ‚Äö√Ñ√∂‚àö‚Ć‚àö√ëx‚Äö√Ñ√∂‚àö‚Ć‚àö√ëy(x ‚Äö√Ñ√∂‚àö‚Ć‚àö‚↠y = 0)


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