How do I type the AND and OR symbols used with inequalities?

[coloredmath]

Like the upside-down U for "or" and the right-side up U for "and".
So I can make it look like

x<7 OR (right-side up U) x>20
x<4 AND (upside-down U) x>-4

HELP HELP!

 

[mmm4444bot]

If you use Windows and you have a font with mathematical symbols (such as one from Texas Instruments), then you can copy-and-paste from the Character Map.

Hmmm, I just tried this myself, but I can only get the intersection symbol ? to display. I cannot get the union symbol to display.

Okay, then. We can use LaTex, instead. The codes are \cup for the union symbol and \cap for the intersection symbol. Click "Forum Help" at the top of the page and select "Getting Started w/LaTex" for more information. You can also click the Quote button and examine the actual code for the lines below.


\(\displaystyle x < 7 \; \cup \; x > 20\)

\(\displaystyle x < 4 \; \cap \; x > -4\)

-

x<4 AND (upside-down U) x>-4

This interval can also be written as -4 < x < 4.