Question

construct two sets A and B such that Aintersection B={}
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Answer 1

Answer:

This is just asking for two sets that have no element in common.

Because

  "A intersection B" = A∩B

is the set elements that A and B have in common, so saying that A∩B = {} is just saying that there are no elements in common.

An example is

 A = { cow, horse, duck, goat }

 B = { house, mouse }