Relations

[distant robin]

pls help

[hallow charm]

Does $\bN$ start at 1 or 0?

[robust elm]

SWR

[distant robin]

At 1

[hallow charm]

What is P(X)? Power set?

[distant robin]

Yes

[hallow charm]

What is $\Delta$?

[robust elm]

SWR

[distant robin]

Symmetric difference

[hallow charm]

Oh. $A\Delta B=(A\setminus B)\cup (B\setminus A)$?

[robust elm]

SWR

[distant robin]

Yes!

Sorry I made a mistake, it is
$A\Delta B /subseteq C\Delta D$

[robust elm]

alesi

[hallow charm]

That's what was wirtten in the problem

[distant robin]

I wrote C∆B instead of C∆D I'm sorry

[hallow charm]

!status

[wild depot]

What step are you on?
1. I don't know where to begin.
2. I have begun but got stuck midway.
3. I got an answer but I was told that it's wrong.
4. I got an answer and would like my work checked.
5. I have a question about someone else's work/solution.
6. I have completed the problem and don't need help anymore. Thank you.
7. None of the above

[distant robin]

I don't know where to begin

[hallow charm]

You know $A$ and $B$, so you can find $A\Delta B$

[robust elm]

SWR