I have this question for homework:
$$\begin{align} A &= \lbrace 1, 2, 3, 4, 5, 6, 7, 8, 9\rbrace \\ B &=\lbrace 1, 2, 6, 8\rbrace\end{align}$$ Calculate $A-B$.
Answer $A-B = \lbrace 3, 4, 5, 7, 9\rbrace$.
I think it is correct but I am not sure.
2026-04-24 12:26:41.1777033601
Totals homework
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This is indeed correct. It's the set minus operation, also written as ${A\setminus B}$