Answer to Question #166723 in Discrete Mathematics for Aaron

Question #166723

  Determine whether each of the following statements is true or false. State the reason.

i) ∅ ∉ ∅

ii) ∅ ⊆ ∅

iii) {∅} ⊆ ∅


1
Expert's answer
2021-02-26T00:53:41-0500

i)a(a) Truei)\forall{a}(a\notin\varnothing)\Rightarrow\varnothing\notin\varnothing\text{ True}

ii)a(a) Trueii)\forall{a}(\varnothing\sube{a})\Rightarrow\varnothing\sube\varnothing\text{ True}

iii) has zero elements, and {} has one element.iii)\varnothing\text{ has zero elements, and }\{\varnothing \}\text{ has one element.} ;\varnothing\sube\varnothing;

{} is False\{\varnothing \}\sube\varnothing\text{ is False}



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