Question

http://prntscr.com/b0boih

Answer 1

@agent0smith

Answer 2

C n D just means list all the things that are in both C and D. Which ones do they have in common?

Answer 3

FYI
\(C \cup D\) >> `C \cup D`

\(C \cap D\) >> `C \cap D`

Answer 4

Thanks, @hartnn, i couldn't find them in the list of latex symbols

Answer 5

C \cup D means what they have in common

Answer 6

Yes, so what do C and D have in common? What is in both

Answer 7

\[C \cup D\] is electric

Answer 8

i dont get the last one D

Answer 9

But you get the others?

D' just means all the things that AREN'T in D.

Answer 10

thats what the apostrophe means?

Answer 11

Yes, apostrophe means complement, the complement of D is just all the things NOT in D.

Answer 12

whats the difference between

Answer 13

\[\subseteq and \supseteq \]

Answer 14

I think they're just like < and > symbols

Answer 15

x > 2 and 2 < x are the same thing. I think it's the same with those symbols

Answer 16

thanks danno. next question.