What is the range of a function? | Functions | Algebra I | Khan Academy

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  • เผยแพร่เมื่อ 23 ธ.ค. 2024

ความคิดเห็น • 97

  • @jamikemichelohia2615
    @jamikemichelohia2615 4 ปีที่แล้ว +9

    I'm now in college in 2020, and this video just recapped everything i need to know about domain and ranges.
    Thanks sal 🙏

  • @reatile
    @reatile 7 ปีที่แล้ว +153

    This is one of the most difficult things to Understand

    • @lovlee8645
      @lovlee8645 4 ปีที่แล้ว +15

      Ive literally had this is in my math for 3 years and i keep forgetting

    • @unknownfreak1636
      @unknownfreak1636 2 ปีที่แล้ว +4

      Can you simplified it more? I still don't get it

    • @muhammadibrahimtaqi8123
      @muhammadibrahimtaqi8123 ปีที่แล้ว +1

      Is it still hard to understand?

  • @RiddhiKhan
    @RiddhiKhan 8 ปีที่แล้ว +223

    Quick and dirty. Just my style. ;)
    I'm so gonna fail tomorrow.

    • @suchandraac
      @suchandraac 6 ปีที่แล้ว +4

      Riddhi Khan XDDD I hope you passed

    • @sojysj4637
      @sojysj4637 6 ปีที่แล้ว +7

      Riddhi Khan what happened now ?😂😂

    • @lyn4473
      @lyn4473 4 ปีที่แล้ว +1

      i hope you passed!

    • @lovlee8645
      @lovlee8645 4 ปีที่แล้ว +2

      Today's my test WISH ME LUCK

    • @juliarottler7029
      @juliarottler7029 4 ปีที่แล้ว +2

      @@lovlee8645 how did it go?

  • @randomstuff8729
    @randomstuff8729 6 ปีที่แล้ว +67

    If you're seriously concerned about failing your exams, just become a police officer. Legit all you need to do is pass a medical and pass an exam that asks for you to give a logical answer. In the UK we can get paid start salaries of ~£27K and have a full scholarship in the first four years, and after seven years you can earn up to ~£45K. That's my backup :D
    Or just become a teacher, most of them don't know what they're doing either... xD

  • @fierybookworm
    @fierybookworm 9 ปีที่แล้ว +28

    This is perfect! Now I totally get it! Thanks a lot~! ^_^

  • @bloodykills7509
    @bloodykills7509 8 ปีที่แล้ว +125

    My brain can't handle this. :(

  • @abeersiddiqui5670
    @abeersiddiqui5670 4 ปีที่แล้ว +15

    no one:
    sal: let me just change the color here

  • @alisonbarker3862
    @alisonbarker3862 7 ปีที่แล้ว +13

    Dear Mr. Khan, thank for your videos, I am attempting to learn maths by myself. The first video on Functions was funny. I read somewhere that you need funds to continue? Is this correct? p.s. Do you or one of your viewers know of an online community of people teaching themselves mathematics? G'day from Australia

  • @Asad-xu2xm
    @Asad-xu2xm 6 ปีที่แล้ว +19

    the FIRST khan academy video that's not helpful

    • @ankitaaarya
      @ankitaaarya 5 ปีที่แล้ว +1

      You need to watch domain video first t understand this properly

  • @caobilly2595
    @caobilly2595 7 ปีที่แล้ว +5

    This is Really Really helpful!Thankyou

  • @oofsmd5164
    @oofsmd5164 6 ปีที่แล้ว +29

    😘 goodbye my A+

  • @galleryg998
    @galleryg998 5 ปีที่แล้ว +2

    It’s easy to watch because he has a nice voice

  • @313pookie313
    @313pookie313 2 ปีที่แล้ว +1

    Thank you very much, you made this all so much easier to understand!

  • @itzelgarcia9403
    @itzelgarcia9403 9 ปีที่แล้ว +19

    i have finals this week and i need serious help on domain and range of a graph and inequalities pls help!

    • @itzelgarcia9403
      @itzelgarcia9403 9 ปีที่แล้ว +2

      +itzel garcia for algerbra 1

    • @imarealgloman9484
      @imarealgloman9484 7 ปีที่แล้ว +2

      itzel garcia Algebra (anything math) is aids my brain cant handle it😂

    • @shafqat4245
      @shafqat4245 7 ปีที่แล้ว

      what kind of help were you expecting from this????

    • @marypoppins4394
      @marypoppins4394 7 ปีที่แล้ว +1

      itzel garcia did you pass your finals?

    • @theexplorer7139
      @theexplorer7139 7 ปีที่แล้ว +1

      itzel garcia I have an exam tomorrow on this stuff. Wish me luck lol.

  • @freaksavagegameryt2200
    @freaksavagegameryt2200 5 ปีที่แล้ว +38

    Why i can't handle this and i well fail tomorrow to. 1 like 1 prayer

  • @hervelowe
    @hervelowe 8 ปีที่แล้ว +2

    This helps a lot thank you your the best

  • @ardiawanbagusharisa7040
    @ardiawanbagusharisa7040 7 ปีที่แล้ว +4

    What if we have more variables? i.e. f = a + b + c / d * e ? how can we find the range?

  • @ronakjacob6133
    @ronakjacob6133 7 ปีที่แล้ว +2

    at 6:07 is it not supposed to be g of x??

  • @LegitMusic
    @LegitMusic 6 ปีที่แล้ว +15

    i think my brain just imploded

  • @memeingthroughenglish7221
    @memeingthroughenglish7221 ปีที่แล้ว

    Clear and quick explanation!

  • @Cheannjo
    @Cheannjo 7 ปีที่แล้ว +22

    ...what?

  • @borissimovic441
    @borissimovic441 3 ปีที่แล้ว +1

    This video is very inspiring so I came up with an idea of how to intuitively explain this may be this will help someone: Imagine that a function is a Factory (for example a mortar factory 🏭, and what is a domain? Well, it can't be for example meat, flowers, wood, etc because this factory ie function is not defined to prices these inputs, so our domain is sand, cement, water, etc. What is our output? It's a mortar and that's the range of this function(factory). So functions and factories have something in common they both have inputs, a factory has specific properties and well-defined tasks it is specified in what it should do so does the function, and they both have outputs ie range.

    • @margrette8452
      @margrette8452 3 ปีที่แล้ว +1

      Exactly!! well said👏

  • @UtibeMoses-op3ko
    @UtibeMoses-op3ko 4 หลายเดือนก่อน

    I really enjoyed the class 😁😊

  • @naeniahuybrechts3263
    @naeniahuybrechts3263 4 หลายเดือนก่อน

    thank you so much, can i ask what program you use to write on?

  • @saudabdulaziz35
    @saudabdulaziz35 8 ปีที่แล้ว +12

    how to do it without graph

    • @omarissa3714
      @omarissa3714 7 ปีที่แล้ว +2

      Find the domain of f inverse, it would be the same as the range

  • @886014
    @886014 5 ปีที่แล้ว +1

    That was brilliantly explained. Thanks

  • @leisusiel
    @leisusiel ปีที่แล้ว

    I am going to do my ig this year and this really help me to predict all the key words I can’t understand❤😊❤

  • @yusufenver1599
    @yusufenver1599 4 ปีที่แล้ว +1

    i wish my lecturers drew in such clear format

  • @jeppy4021
    @jeppy4021 4 ปีที่แล้ว

    Thank you! this made things easy

  • @javanwhite5169
    @javanwhite5169 6 ปีที่แล้ว

    What are the advantages of using that really mathy notation to answer? Is that what people use all the time in really high level maths?

  • @justinwilborn8399
    @justinwilborn8399 5 ปีที่แล้ว

    this is so helpful

  • @vanjosh7763
    @vanjosh7763 9 ปีที่แล้ว +1

    Khan Academy can you make a video in how to find the degrees of a bigger hand and smaller hand in a clock and the angle of both hands cover? please :D

  • @jefftheninja8293
    @jefftheninja8293 6 ปีที่แล้ว +1

    How do you find the range of a rational function whose numerator and denominator are both in quadratic?

    • @cf7316
      @cf7316 6 ปีที่แล้ว +1

      Factor both the numerator and denominator then cancel!

    • @jefftheninja8293
      @jefftheninja8293 6 ปีที่แล้ว +1

      or you could find the horizontal asymptote and it will give you a clue

  • @ramakrishnan4356
    @ramakrishnan4356 8 ปีที่แล้ว

    very clear explaination

  • @mzubair21
    @mzubair21 5 ปีที่แล้ว +1

    which software are u using

  • @bearboi6066
    @bearboi6066 8 ปีที่แล้ว

    Set of all positive outputs

  • @dacikiera8155
    @dacikiera8155 7 ปีที่แล้ว +2

    i don't understand the "thing" (x48950u43905)

  • @lr5113
    @lr5113 7 ปีที่แล้ว +10

    this is so confusing

  • @Pouvoir4k
    @Pouvoir4k 7 ปีที่แล้ว +4

    your writing is improving video by video or your software os improving

  • @philipgaje3123
    @philipgaje3123 6 ปีที่แล้ว

    2nd example's range used f(x) instead of g(x).

  • @oljeitulkhagva6288
    @oljeitulkhagva6288 2 ปีที่แล้ว

    nice

  • @nabeelakhan4973
    @nabeelakhan4973 8 ปีที่แล้ว +5

    My brain😂😩😩😩

  • @tfm2860
    @tfm2860 4 ปีที่แล้ว +1

    You saved me from my dads belt

  • @webmaster246
    @webmaster246 3 ปีที่แล้ว

    Besides being perfect , I'll suggest to forget the definition of "function of domain" that includes members outside of any function validity (being defined) , unless you really into Math . Range of function (aka outputs, function's resultants) are all it meters most of the cases . f(x) {1/x} is a valid part of definition of "function of domain" , until the definition of "range of function" for such function i.e. f(x) {1/x} is introduced : when it's introduced , not all possible outputs , but just some sort of range becomes possible output values for such function's inner logic . TL;DR "function of domain" includes valid and not valid range within which function notion can exist , but it's logical validity can be available only within specific "range of function" with accordance to some rules applied e.g. when x not equal to zero . Hope that helps .

    • @webmaster246
      @webmaster246 3 ปีที่แล้ว

      As a complementary , theoretically you can be a teacher at every place , but practically not every place can consider you as a teacher i.e. I cannot be a classroom teacher at home , because my home does not meet the condition of the classroom, it's home for Christ sake ! In theory everything is possible , but in practice , there are always some restrictions (rules) applied , right ? Within those rules (logic) applied we get what the definition of "range of function" is all about !

  • @royal6774
    @royal6774 3 ปีที่แล้ว +1

    Not x its xx?

  • @ellamaebeemundo4877
    @ellamaebeemundo4877 5 ปีที่แล้ว

    Cool

  • @yikyang3423
    @yikyang3423 8 ปีที่แล้ว

    Isn't the last range should be g(x) not equal to 0 instead of f(x) not equal to 0?

  • @unknownfreak1636
    @unknownfreak1636 2 ปีที่แล้ว

    Can anyone simplified it more? I still don't understand

  • @김준형-r2g
    @김준형-r2g 4 ปีที่แล้ว

    한국어자막이 끊기네요...ㅠㅠ 고쳐주신다면 감사드리겠습니다

  • @JyothiSwaroopM
    @JyothiSwaroopM 9 ปีที่แล้ว +2

    Whats the app used? Khan Academy 😓😭

    • @lunastaarz
      @lunastaarz 4 ปีที่แล้ว +1

      Jyothi Swaroop M. The app is khan academy

  • @gabrielrmattoso
    @gabrielrmattoso 9 ปีที่แล้ว

    Khan Academy Nice video, but the second function is g(x), not f(x) as wrote at the second function's range. Putting an annotation to the video will help to not confuse the beginner's mind.

  • @pinkhorizon
    @pinkhorizon 6 ปีที่แล้ว +2

    One word confusion!

  • @vidushisharma2695
    @vidushisharma2695 11 หลายเดือนก่อน

    why sir sounds like frank zappa

  • @Worldbizzare
    @Worldbizzare 6 ปีที่แล้ว

    still confused help

  • @genestroberts4667
    @genestroberts4667 3 ปีที่แล้ว

    Goodbye f and hello a

  • @lingwei8906
    @lingwei8906 7 ปีที่แล้ว

    I don’t even understand... lol and i have this homework r.i.p me*_* ~_~

  • @Pengwyne
    @Pengwyne 6 ปีที่แล้ว +1

    Ambobo ko amp di ko pa rin gets T^T

    • @nanogon7767
      @nanogon7767 6 ปีที่แล้ว

      Sylvette Choi woah filipino

  • @air_ios7407
    @air_ios7407 5 ปีที่แล้ว

    Kinda get it now lol.-____-

  • @cheesecake854
    @cheesecake854 7 ปีที่แล้ว

    I still don't understand. whyyyyy.... myghad, halp meh. (TT)

  • @mricarda
    @mricarda 4 ปีที่แล้ว

    I'm gonna fail.

  • @WalkingFaith2001
    @WalkingFaith2001 4 ปีที่แล้ว

    I’m sorry man but your saying a lot of big words that I don’t quite understand, so I’m just gonna take that as disrespect.

  • @ktreznin5538
    @ktreznin5538 4 ปีที่แล้ว +1

    Confusing. Sorry.

    • @ktreznin5538
      @ktreznin5538 4 ปีที่แล้ว +1

      (I'm a math teacher, and this will not work with my students. :/)