What Is a Function? | Precalculus

[@TheOrganicChemistryTutor]

Functions - Free Formula Sheet: bit.ly/3Ai8NZv Functions and Graphs: kzbin.info/www/bejne/kIWop2uFo6yUrtE Transformations of Functions: kzbin.info/www/bejne/qqq0faNsrZJ6pbc Graphing Polynomial Functions: kzbin.info/www/bejne/qICylpmaprKpqqM Final Exams and Video Playlists: www.video-tutor.net/ Next Video: kzbin.info/www/bejne/fqqxmpiVhb6aqbs

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It's been years since I took this and completely forgot how to read functions properly. Thanks for the super clear refresher 😊

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MR. Organic Chemistry Tutor, thank you for a smooth and beautiful definition of a Function.

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I’m in 9th grade and we haven’t done this in school yet . So I literally don’t have a teacher to teach me this but because of how amazing this video is I instantly grabbed the concept

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[@SharpCookie]

Great explanation! One of my students asked me why do we usually write "f(x)," and I'm guessing "f" stands for function...? I know g(x) is the other common notation.

[@GodbornNoven]

indeed, f stands for function

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Totally Awesome Instruction on Functions! 🥰🤩👍🏽🥳

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[@leulhaile3794]

2:18 I didn’t get it how come y=2(1)+4=6 hw did it come

[@balls2442]

2 multiplied by 1 is 2 than add 4 =6

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Hi Is the explanation of the ‏pre -calculus material that is similar to the explanation that includes Udemy and is it not different?

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[@dawseym6412]

คือ ปัญหา ระหว่าง output ( เจ้าของหรือผู้บริหาร (ก็ต่อเมื่อ ) ) กับ input ( นักวิทยาศาสตร์หรือผู้สร้าง ) ครับ และ ต้องการการตอบสนอง ของ ช่องว่างระหว่าง

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[@riichan2895]

im just kinda confused in the part where, do u need to add first or subtract? ik theres a PEMDAS rule but why is here different? anyone help

[@Ullol_tdsxtdx]

Well the PEMDAS rule states that whatever operation is on the left side it will be first done but The operations on the parentheses then the exponents must be prioritized then Multiplication and Division must be done before doing Addition and Subtraction.

[@shreemoyeechakraborty382]

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[@PixelPawz]

10:48 Based on PEMDAS, shouldn't f(2,3) be -19? f(2,3) = 2(2²) - 3² + 3(2)(3) f(2,3) = 8 - 9 + 18 f(2,3) = 8 - 27 f(2,3) = -19

[@t3zmazerunner128]

-9 + 18 = 9, not -27. If it was -9 - 18, then it would be equal to -27

[@andromedanyxmortem9386]

You subtract first before adding since you are solving from left to right, not right to left. Just because Addition is ahead of Subtraction in PEMDAS doesn't mean it should always go first. It is just said that after Multiplication/Division(this also applies to these two operations) you then do Addition or Subtraction, depending which comes first. For example: 4 × 5 + 3 - 1 = 22 Addition comes first because it came first before subtraction. In the case of 4 × 5 - 1 + 3, the answer will still be 22 since you first subtracted one then added three. (Idk if this is actually correct because I am currently operating on what remains of my brain cells due to a lot of problems. Like srsly, research problem, algebra projects, statistics quiz, that damned EsP(I am still on the side of replacing this with either ROTC or Philosophy) interview(my teacher is just a boomer who just wants to make our life harder) plus not to mention chemistry. I already have grey hairs and I'm just 13 wth)

[@andromedanyxmortem9386]

Not to mention my algebra teacher talks fast and assumes we know this stuff already despite having two years of modular learning. How does she expect us to remember this?

[@EmiliarCruztorres]

Me I have a test on the functions on Thursday this Thursday.

[@theengineeringstudent2678]

When you say, it is not a function, what do you mean by that?

[@mangomanlassi7779]

essentially a function is determined if a straight line cuts through a graph ONLY once. So if it cuts 2 or more times, it isnt a function. What you should do is try to draw a graph, then draw a straight line through it and see if it intersects with the graph once. If yes, it is a function.

[@txuezea4072]

If it's not a function...then it's a relation

[@ntbyng]

I regret learning quadratic functions before finishing my functions unit :(

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Very helpful

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this was so helpful, i am doing calculus yet i am blank

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Mal-f(x) Dys-f(x)

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W teacher

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bros gonna carry me through grade 11

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good luck bro

[@theifelltower]

My cousin goes to 5th grade and he already knows what is a function

[@joshuamasila3427]

Why isn`t a multi-variable function also classified as one of the types of functions?

[@SunnySunflowerSeed]

This is precalculus,you troglodyte,this is shit for 7th graders

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Domain Expansion: Malevolent Shrine

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Bruh im in between bunch of kids here and im learning this for the sake of sat 1

[@martintoogood1444]

After watching the whole video, I still have absolutely no idea what a function is. It's all gibberish unless you are already well versed in algebraic maths and its terminology.

[@elizabethhallett5060]

is not the last answer 19? (pemdas)

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Wonderful explanation, may God guide you to Islam

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Shitty comment this is about maths not religion

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2

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