Question

What is the domain of the following relation: R: {(6, -2), (1, 2), (-3, -4), (-3, 2)}

Answer 1

What part is confusing you?

Answer 2

I just cant remember how to do it... :/

Answer 3

Do you remember what the domain is?

Answer 4

No :P
I am pretty sure I know, but I can't seem to rack up the memories

Answer 5

\(\bf R: {(\color{red}{6}, -2), (\color{red}{1}, 2), (\color{red}{-3}, -4), (\color{red}{-3}, 2)}\)

Answer 6

\[dom(R) = { x | (x,y) \in R }\]

Note: the right hand side should considered a set...

Answer 7

So it's the set of x's such that . . ..

Answer 8

I am sorry but I am a bit confused...

Answer 9

\(\large \begin{array}{lllllllll}
&x&y&x&y&x&y&x&y\\
R: \{(&6, &-2), (&1, &2), (&-3, &-4), (&-3, &2)\}
\end{array}\)

the "x" are the domain

Answer 10

jdoe highlighted the elements in red...

Answer 11

dom(f) = {-3,6,1}

Answer 12

Oh.... Now I feel stupid :P

Answer 13

oh, I mean, "dom(R)"

Answer 14

make sense?

Answer 15

Yeah
Thanks :)