Posted by yengiang on Monday, May 9, 2011 at 10:22am.
(The set of all such that)
A={n in Z 2 divides n}
B={n in Z 3 divides n}
Both are contained in the universal set
U=Z
a/ What is A union B?
b/ What is the complement of A?

Discrete math  yengiang, Monday, May 9, 2011 at 10:34am
a/ Sorry, it was what's A intersection B?

Discrete math  MathMate, Monday, May 9, 2011 at 3:52pm
A={n ∈ Z 2 divides n}
B={n ∈ Z 3 divides n}
A∩B
={n in Z 2n and 3n}
={n in Z 6n}
That is
A∩B is the set of all integers divisible by 6.
A'={n in Z 2∤n}
= all odd integers.
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