Hi,

I am trying to understand this set related question:

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Given the following sets:

V= {n∈ ℤ|0 ≤n≤ 15}

l= {3, 4, 5, 6, 7}

and a list of 5 sets:

Ai= {n∈V|nis a multiple ofi}, where alli∈l

(Notation: ∪i∈ {1,2,3}Ai=A1 ∪A2 ∪A3 )

∩i∈lAi= ?

∪i∈lAi= ?

Answers:

a. {11,13}

b. {3,4,5,6,7,8,9,10,12,14,15}

c. {0}

d. {1,2}

e. {0,3,4,5,6,7,8,9,10,12,14,15}

f. {0,1,11,13}

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We need to determine what the answer is for:

∩i∈lAi= ?

∪i∈lAi= ?