Let x, y, z be real numbers, A, B, C be finite sets of real numbers, and f:Z Z. Classify each of the following expressions as being: a set, a statement or meaningless. f(2020) set number statement meaningless f(x) set number statement meaningless x+|A|| set number statement meaningless AA(BnC) statement meaningless set number |Ax B| meaningless statement number set f(|A)+ f(B) – f(An BnC) meaningless statement number set
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Adding to more parts of same question:
7: f(i)≠f(i+1) for all i ∈ Z
set , number, statement or meaningless
8:{n∈Z: f(n)∈ AUBUC}
set, number, statement or meaningless
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