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Homework Statement
Let A= {1, 2, 3}, B= ℤ+, C= [1, infinity)
That is C= {x∈ℝ:x≥1}
What is B - A and C - A?
Homework Equations
The Attempt at a Solution
I am unsure of how to go about answering this.
I know that B - A means what elements are in B that aren't in A. Would that make the answer B - A = {Z+>3}? Or is B - A an empty set since 1, 2, 3 are positive integers?
As for C - A, I am unsure of how to approach this one, would it be C - A = {x > 3}?
Would both just be greater than 3 since A = {1, 2, 3}?
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