Domain and range of a function given a formula | Algebra II | Khan Academy
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- čas přidán 6. 11. 2011
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Domain and Range of a Function Given a Formula
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![[柴犬ASMR]曼玉Manyu&小白Bai 毛发护理Spa asmr](http://i.ytimg.com/vi/0TsXQ7z2Dh4/mqdefault.jpg)
*I’m watching this through my tears lol*
SAME
Why?
sameee
@@apeacefulworldijustwant6471 Who knows? Perhaps she wasn't paying attention and had work to do. Maybe she has a bad teacher and Khan Academy is the only way for her to understand it. Maybe it's a combination of those two things.
ME OMG
I'm starting to think I have a learning disability.
me too lmao
Same
Nah it’s okay if you don’t get it right away just keep at it and I know you can win
Me rn:
When you got soo much work to do that you don't even have the time to cry :>
Cheer up!! We can do this.
Same
y’all be really listening while im just reading comments and be like yeah it’s hard.
Lol same 😂😂
hahahah same😂
Rt
I'm reading the comments to see whether I can help anyone out :)
Why does it feel like I'm always watching math videos but never actually retaining the information?
because thats whats happening
Bc our brain puts out information we don’t need
@Spla Dunctious it iz what it iz
@Spla Dunctious not really
@Spla Dunctious that’s cool, but that just means you need it, not me
from the bottom of my heart, thank you for helping me throughout the years
:) he's a hero
How is it going))
Starry Night good
@@Sss-mb5qs Same Here
Plus one!
I'm watching this video and I still don't understand. God bless me.
Same bro
Can i explain to you
You Wii definitely understand
@@sonukr.3155 that was months ago. I understand it now. Thanks though👍👍
@@hady141 I need help🥲🥲
HAHAHAHA😂👍
Im just smilling in emotional pain throughout the video.. and im trying yo learn this for online class😃.
Then WHAAAAAT IS THE DOMAIN OF 3x²+6x-2 ?!! Aaaaaah
I'm trying to learn this for online school as well. There are multiple domains for the equation. The domains were the x values in the table that he made. The range was the answer to the equation after he plugged the x value into the equation.
All real numbers
all real numbers. for any x value that is real there is a y value that is real
its everything, cause literally nothing can break the function
Dominix and Rangey, That's how my teacher put it to remind us that the domain=x an the Range=y
You and Failzor2 must be classmates
+Nuck Chorris my teacher always talked about his friend deXter rileY
Wow lol u made tht more easy for me!
Gonna use that...
With all due respect, it’s not very hard to memorize what the meanings of two words are.
low-key freaking out cause I took a high level in math thinking i'd do well. But all i've learned so far is that I'm as smart as a rock :)
you got this
mood af.
Lol
when obama can teach you math
Joshua Isaiah Navarro ahhahahahahahahahahah this comment is lit😂😂😎😎
Blueberry Cheesecake 555 stop
Blueberry Cheesecake do you play chess?
Because you are slightly late.
lmao this had me rolling
not me crying right now because i have a test in a couple days and i was supposed to learn this forever ago
did u pass? give me hope :(
Like Ur profile pic
ik you commented this like year ago but did you understand it? if so please help me, because i have a test tomorrow and i’ve been out the whole week/unit so i don’t really understand it.
fr
@@brandonrobledo4281 how was your test
Wow I learned this lesson in just 8 minutes while my prof was teaching for 1 hour I can't even understand a single thing. Thanks man, you're the real MVP!
ayyy i found a kpop stan in a maths video
@@tehreemj6350 I love kpop more than studying
@@ilovehuhyunjin08 ok lil guy
im just stupid I think, ive watched so many videos and I still don't understand
same bro, same
Same
Same
SamER
i find that khan academy is not the best channel for subjects. The organic chemistry tutor is the best because he teaches the basics and gives a bunch of examples of different types.
When I have a quiz about this 20 mins from now but I still can't learn it 👁️👄👁️
Any updates
Why can't my math teacher teach this well?
Ikr! I had to watch that exact video last night!
Khan academy helped me do well on my placement test for college, and is now helping me get through my precalculus algebra and trig classes 💚💚💚
Thank you!!!
😅
Why does my brain can't function when I heard the word math?
My brain does that toooooo. It completely turns off after hearing the word math.
@@lilac_moon1457 u didn't get it lol
@@luc.b6951 what?
Fr I'm over here watch math vids for my test I'm doing and sont understand nothing
My math teacher has not given the virtual students(my school is in person with the option to be online) a single lesson but still expects us to understand and do the homework. These videos are my only hope lol.
i know you commented this a year ago but im going through the same thing, what did you do to get through it?? :)
@@ninjapiggy1274 What helped me honestly was using apps like Photo Math to solve an example question and then I'd try to figure it out myself
@@ninjapiggy1274 I also asked friends and tried to work it out with somebody
@@kao4266 oo ill try that tysm :))
lsgh?
My teacher put it this way. Dominix and Rangey, Domain being x and range being y.
Thats really helpful, I'll remember that, thanks 😊
W teacher
r u still alive
@@cloud6136 lol
god i wish I had ur teacher
I've been constantly trying to understand the domain and range from all kinds of different angles and i think I'm finally getting it. Don't give up, keep pushing
Funny how i'm learning more from this channel than my PAID college.
Hi, I am a student of University of the People, I have really benefited a lot from your programs. Thank you so much for all your selfless efforts to help us as students. We have learned a lot.
That university is real?
@@comfortkabanshi5048 yes the university is real and has very amazing experience.
i just watched this before going to the exam
YOU SAVED MY LIFE BROTHER
MUCH LOVE TO YOU
Funny Videos Of All Time hahahahahahaha
lmao what a mood but highkey true XD
I wish my brain is like yours :(
Sal,your voice,makes me happy😃😃
My mind has made the decision to shut down when it hears anything about numbers adding subtracting multiplying or dividing
Why does my brain stop functioning when I heard the word function
we had this during grade 8 but I totally forgot all about it and because school just started we are reviewing past lessons. my teacher makes it really confusing and his grammar makes it a whole lot worse! thank you!! you're a life saver
Thank U very much sir....I was very much confused with the Concept of Range.....but Now its clear as U explained it Graphically....Thank u very much once more sir.....Excellent !!!!
My A level exam for Pure Mathematics 1 starts in less than 5 hours so this helped
Soo much better than my teacher in school, she never explains anything properly, unlike you.
I cannot thank you enough for these videos. They are extremely helpful to me. I need all the help I can get :D
Thanks for this vid, finally someone that can explain it to me clearly enough to stick to my mind.
Thank yooou! i have an exam in 3 days and this really helped!
what country are you from? my exam is also on Tuesday?
+Joseph Adame Australia 🇦🇺
+Tapprincess45 ah, ok
Thank you so much since I just started in the K to 12 curriculum, I have prelims to answer this for I'm not a good mathematician but a great listener. Thx
Thanks sir for explaining this topic . You helped me a lot . I never saw teacher like you .
Thanks so much from 12 years after the release of this video.
Thank you, Domain and range give me so much trouble in pre-cal. Video has given me a good understanding.
It's so easy to understand ! life is like trying to set up domain and give it's a law to get a range ,thus we can get a different life .
bro what...
“Functions are often disappointing.”
“Now, the domain can be whatever I want.”
Watching this to study the day of a pre cal challenge exam. Fingers crossed
this is very helpful, thankyou!
crying cuz i forgot all about this and have to relearn it all 💀🤡
thanks for this. this is awesome. I'm starting to enjoy mathematics
"JAI HIND DOSTON "🇮🇳
Thanx a-lot u are helping me .. thank God 🙏for having good ppl who would love ❤️ to help others for nothing .
thAnks to this...now I know...this is so easy.yet when our teachr discussed it..it seem to complicated ......BIG BIG THANKSTO THIS!!!!!!
Best explanation! Finally understood!!
What is the name of the man who does these lessons? He needs an award.
I spaced out most of my class so Kahn Academy don’t let me down :,) I’ll update and see if this helped me
Edit: IT DID I MAKE A PRETTY GOOD GRADE ON MY TEST
Awesome. Thank you . I had this question on the assignment due after march break . Thank you .
I’m in my 3rd year of Uni taking mathematics of natural science and it’s hard because my prof assumes I remember everything from trig and algebra and all but it’s been over 3 years since I’ve taken a class like that so I feel so incredibly behind. I’ve always liked math but I’m struggling a lot rn
Thank you, you make it look so easy.
no one has ever made me understand maths like this before
Thank you! I have an exam tomorrow.
Thanks alot its really helpful
Watching this 20 minutes before my unit test
Thank you for your video😊.It helps a lot😊
How to solve:
Function. Domain. Range
1.y=7-5x. ? ?
2.y=2x²
3.y=squareroot of X
4.y=-x²
5.y=10-3x
OMG This is actually so good
I am going to get 2 points tomorrow because of this video. Thanks, Khan Academy !!
Hi Sal, pretty well with the graph explanation but make it a bit simpler. Find f(x)=y such that the determinant is negative and the number turns imaginary. Since for y=-5, you get 3(x-1)^2 and hence the determinant must be 0 because there are equal roots, any y below -5 would make the discriminant 0 and hence the range is [-5,∞). This is what I was taught in 8th grade.
Omg thank you so much! Literal life saver 😭❤️
so helpful, thanks a ton.
I’m learning this literally right before a test 💀
khan academy literally always saving my semester!
Thank you for this video, I am in Algebra 2, but I don't have a teacher assigned yet soooo... ye thanks! :)
very very helpful thankyou sir :D
Very good!!! Good luck to Khan Academy Group
Very helpful, thanks.
we have a test over this tomorrow and i still don't get it 👁👄👁
Thank u sir , it was very useful.....🙏🏻
wow..thanks you..nice explaination
brilliant lesson!!!
Ive got a math test tomorrow thx so much for thd help
Currently having a mental breakdown, but I still got math homework so here i go >:(
Really shows just how messed up the school system is...
i can feel my head pulsating
my prof decided since carona us math students dont DESERVE ZOOM LECTURES ( even tho my tuition is paying for them) god bless you bro
Academic comeback of the century
EXCELLENT LECTURE INDEED!!!
I love your lesson I learn a lot from watching this ☺ but 1 thing that I didn't understand is the range on the last part..
Him: Talks about imaginary numbers
Me: *What now*
I spaced out while watching this
One can also calculate the range by using differentiation... That'll make it easier. But yeah, this falls into algebra, before the calculus. So, great.
Btw, thanks a mountain for this video! 🎉
*10 years and i still don't understand*
Wow! Sir you are great
Thanks a lot for your videos
is there anyway to get a written out copy of what was covered in the video because it was helpful and i want to refer to it later in my notebook
I understand domain, but range is still confusing. Like why can’t it be lower than -5?
Maya Johnson because the minimum point of the graph is and always will be equal to or more than -5.
It can't be less than -5 since the parabola from its vertex move upward
Thank you!
Studying for a math test this helped...
our Domain and range only has {x|x} or {y|y}, no graphs or table of values, how about that???
You may like to check my video too on intercepts, domain, and range
You may like to check my video too on intercepts, domain, and range
Am I the only one that loves this guys voice
Thanks for the explanation, you're clapped.
Thank you, you save me through high school😂
2019 squad where you at
i stand with you
thank you teacher.
Crying over my homework right now because it's overdo and I still don't understand ;)
Love from Bangladesh 🇧🇩 ❤ sir
BRO ur a lifesafer
Thank you so much sir