Domain and Range Interval Notation

Ms. Smith's Math Tutorials
You Try Answer:
Domain: ( -∞ , ∞ ) or All Real Numbers
Range: ( -∞ , 3 ]
Function?: Yes

[@JoshChaiya]

I've been trying to comprehend this math ALL day, and I finally retained this math concept by watching this video. Thanks a bunch!!

[@sk8eryoncegood641]

Thank you so much for this simple and thorough tutorial, I feel confident for my quiz tomorrow! :)

[@deku8966]

Life saver I was really confused about my hw. YOUR AWESOME

[@robynking939]

Thank you, this was a very well taught concept. I haven't taught this in years and my class found it very helpful.

[@ms.smithsmathtutorials]

Thank you! I am glad it helped!

[@DawgyStyl67]

Tthat was great i actually understood everything you were saying you spoke slow so we could understand and explained everything you were doing triple thumbs up

[@ms.smithsmathtutorials]

Thank you! I am glad it helped!

[@stephenugochukwu9472]

Thanks a lot for your help, I have been struggling with this concept for long

[@ms.smithsmathtutorials]

You're welcome! I am glad it helped!

[@chestervonne8503]

You're a lifesavior, tyvm!

[@Myopinion-2]

Great video tutorial!

[@dedeng7227]

Thank yo mam. It help me alot.🙂

[@beverlys6796]

thanks for making this stuff make sense.

[@azeoly]

hi, what does it mean when, for example, the domain starts with [ and ends with )?

[@ms.smithsmathtutorials]

When you see a [ or ] symbol it means you have a solid point (also called an "included point"). When you see a ( or ) symbol it means you have an open point (also called a "non-included point") or an arrow if it is infinity. If the domain starts with a [ and ends with a ) then that just means the point furthest on the left is solid and the point furthest on the right is an open point or an arrow if it is infinity I hope this helps!

[@angelicadelacruz6224]

What is the purpose of ( R) sign and what it means?

[@ms.smithsmathtutorials]

The R sign stands for "All Real Numbers" and is just a different way to express negative infinity to positive infinity. It is just a shorter and easier way to write the same answer!