# Discrete Math Help! 1. ∅∈{1,2,3} True or False ? 2. ℕ⊆ℤ True or False ?

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- PuzzlingLv 73 years agoFavourite answer
1. ∅∈{1,2,3}

False.The elements of that set are 1, 2 and 3. ∅ is NOT an *element* of that set, although it is a subset of every set.

2. ℕ⊆ℤ

True. Every natural number {1, 2, 3, ...} is an element of the set of integers {..., -3, -2, -1, 0, 1, 2, 3, ...}. So N is a proper subset of Z.

- IndikosLv 73 years ago
1. ∅∈{1,2,3} False - ∅ is a subset of every set but not an element of it

2. ℕ⊆ℤ True

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