Combinations of functions and their domains (KristaKingMath)

[@syamalchattopadhyay2893]

Excellent clarity in the video lecture.

[@sargervbftw626]

I love the way you present your information. It helps a lot!

[@kristakingmath]

you're welcome, i'm so glad!! good luck on your test!! :D

[@kristakingmath]

You're so welcome!

[@kellipizarro4023]

I've spent three hours trying to figure this out. Watched your video once, now I've got it. You made it so much easier!!

[@kristakingmath]

Oh good! I'm so glad this cleared things up! :D

[@Victoria-it2jw]

Thank you. Short, sweet, and to the point. Just what I needed.

[@kristakingmath]

You're welcome, Victoria, so glad it helped!

[@instacrazy9501]

im so getting an A tomorrow! All thanks to this video! :D

[@ejboy111]

Thanks sooo much! This is soo much easier than what it looks and you teach really well.

[@kristakingmath]

+ejboy111 Thanks! Glad it could help!

[@kristakingmath]

I'm so glad! You're welcome! :)

[@kristakingmath]

oh, that makes more sense. :) yes, very often we rationalize the denominator to get the square root out of there, but i still commonly see it left as-is, so it's up to you. if you want to be safe, just rationalize it. :)

[@ThePinoyMamba]

Keep on posting. It really helps

[@kristakingmath]

You're welcome, I'm so glad!! :D

[@315catlopez]

Thank you so much! I now understand what I'm learning for my class :)

[@kristakingmath]

Awesome! I'm so glad!

[@kristakingmath]

I hope so too!! :)

[@HudymaSkateboarding]

Thank you, I have a test on this tomorrow too, this helped a lot.

[@ProfJohnStats]

So awesome Krista !!

[@kristakingmath]

Thanks, John! :)

[@isahliman7603]

Youre Amazing.. Thank You For Helping Us

[@kristakingmath]

+Isah Liman Glad I can help!

[@Benhuis1]

Thank you so much!!! I will be getting an A on my math test tomorrow. Hopefully.

[@read1communications]

well done. helpful

[@lollygagers-meechie8152]

Thank Yu So Much U Saved My Life !

[@kristakingmath]

Consider it done! :)

[@kristakingmath]

you just can't put a negative value underneath a square root, so values that result in a negative number under the square root can't be included in the domain. :)

[@rickrod8822]

thank you so much for this helpful video !!!

[@punkpriss101]

Thank you!!! Very helpful :D

[@SenorLagunas]

Thank you!!

[@kristakingmath]

Hope you rocked it! :)

[@kristakingmath]

awesome!! :D

[@kristakingmath]

I attended the University of Notre Dame, but I'm not a teacher. I've tutored for many years which got me into making the videos. :)

[@fierybookworm]

Thanks for the help~! ^_^

[@AliJay321]

Why don't you rationalize the denominator for the domain of f/g?

[@shawnfowles8588]

Find (f/g)(x) and (g/f)(x) for the functions given by f(x) = radical x and g(x) = radical 4-x^2. Then find the domains of f/g and g/f. That is a problem from my precalculus textbook. If you can do a video on how you would solve this I would really appreciate it.

[@sawensh8223]

you're the best

[@DrDestinyGaming]

I'm a junior in high school and my math teacher is awful. Thank you for explaining what she never does!🤗

[@kristakingmath]

I'm glad I can help fill in the gaps!

[@botshelopopiekomane8756]

well done

[@2112201211]

How can I proceed in this case below? 1. f(x) . f(y) = f(x + y) 2. f(1)= 2 3. f( V2) = 4 So calculate f(3+V2).

[@MrPetisebok]

this might sound stupid but could you help me with g/f(x) f(x)=square root of x-1 g(x)= x+5 and teach me the domain also.

[@yordanosalemu4205]

Good job...........

[@kristakingmath]

Thanks! :)

[@aliissr]

very helpful thanxxxx :)

[@kristakingmath]

Glad it could help! :)

[@fadyalfons1105]

❤️❤️❤️

[@Mohitchaudary006]

I m from india thanks for helping.

[@jorgena17]

I still don't really understand how the domain is AR#

[@arelycampos3295]

same :(

[@majidrana4007]

nice and gooD

[@parham6676]

Their domain is the same solve some without the same domain ty

[@peace.9850]

you are the moust good teacher .and very pretty .i learn more from your lession .long life for you .

[@farch52]

Great job! only complaint, the closed captioning blocks out bottom of board.. Still awesome though!

[@kristakingmath]

Thanks! And the closed captioning is actually a setting on your end. There's a little "CC" button in the black bar at the bottom of the video, and if you click it, the subtitles will turn off. Hope that helps!

[@farch52]

your awesome!

[@MrRolsen83]

I always thought that you can't have a square root in your domain.

[@Alpha24985]

.The domain of the function should by determined before simplifying the function. for example let f(x)=x^2-1 & g(x)=x-1and we need to identify the domain of (f/g)(x).after simplifying, (f/g)(x)=x+1 and its domain =R but this is not true because (f/g)(x)=(x^2-1)/(x-1) and its domain = R-{1} not R

[@MrRolsen83]

I'm sorry, I meant the denominator. I thought you couldn't have a square root in the denominator....

[@stevecucumber235]

Very good video and you're not bad at all.:)

[@chifun86]

Can I be your friend?

[@ShmegmaLord]

will you marry me