- #1
jonroberts74
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Homework Statement
Let X and Y be sets, and let A and B be any subsets of X.Determine if for all functions from X to Y, F(A-B) = F(A) - F(B) Justify your answer
Homework Equations
The Attempt at a Solution
intuition tells me no because the F(A-B) will have a different x values going to a different y values in Y than F(A) - F(B)
also,
the left side will have x values from X such that they are in [tex]A \cap B^c[/tex]
whereas the right side would have x values from X such that they are in [tex]A \cup B[/tex]
and clearly [tex]A \cap B^c \neq A \cup B [/tex]
but I have a feeling that intuition is incorrect.