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🚧 Setup for 6.3

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tomit4 2026-07-21 18:05:13 -07:00
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chapter_6/test_yourself.md
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@ -89,3 +89,20 @@ $X \subseteq Y$; $Y \subseteq X$
that is in _____ and not _____ or that is in _____ and not _____.
$X$; in $Y$; $Y$; in $X$
---
Page 435
**Test Yourself**
1. Given a proposed set identity involving set variables $A$, $B$, and $C$, the
most common way to show that the equation does not hold in general is to find
concrete sets $A$, $B$, and $C$ that, when substituted for the set variables
in the equation, _____.
2. When using the algebraic method for proving a set identity, it is important
to _____ for every step.
3. When applying a property from Theorem 6.2.2, it must be used _____ as it is
stated.