tomit4/discrete_mathematics_with_applications
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

🚧 Fin 8.1

Browse source
This commit is contained in:
tomit4 2026-08-15 17:12:17 -07:00
parent 91773f401c
commit 5a31dcd06c
2 changed files with 377 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

10
chapter_8/test_yourself.md
View file

@ -5,13 +5,23 @@ Page 515
1. If $R$ is a relation from $A$ to $B$, $x \in A$, and $y \in B$, the notation
$x R y$ means that ____.
$x$ is related to $y$ by $R$
2. If $R$ is a relation from $A$ to $B$, $x \in A$, and $y \in B$, the notation
$x \cancel{R} y$ means that ____.
$x$ is not related to $y$ by $R$.
3. If $R$ is a relation from $A$ to $B$, $x \in A$, and $y \in B$, the notation
$(y, x) \in R^{-1}$ if, and only if, ____.
$$ (x, y) \in R $$
4. A relation on a set $A$ is a relation from ____ to ____.
$A$; $A$
5. If $R$ is a relation on a set $A$, the directed graph of $R$ has an arrow
from $x$ to $y$ if, and only if, ____.
$x$ is related to $y$ by $R$