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

Sal introduces the concept of "domain" of a function and gives various examples for functions and their domains.

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Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a "gatekeeper" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.

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[teamistar]

Ive bern going through notes trying to remember this and you post it the day BEFORE my math final . God bless you 😂

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[fadyhameed]

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[LRENZ]

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[margrette]

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[MrRicky]

You're the man, very clear explanation

[BE_BEAUTIFUL_]

Thnx alot sir.. Realy it helps me alot to understood and find the domain of a function... Tysm sr.. ❤❤

[thewisearchitect]

Just wow. Thanks for a wonderful explanation.

[anthonypascual]

Nice refresher for Laplace transforms 👀

[existenceisabsurd]

3:14, does someone in the background laugh at "double stroke"? Obviously asking the important questions here.

[abdullah.gaming]

This is the most easiest explanation I have ever seen

[yurtwnl]

I have a math test tommorrow thank you so mich

[chibiprussia]

Oh sure, you upload this AFTER I failed a quiz miserably. Several weeks ago.

[berndmayer]

a function has per definition a domain. There is nothing left to do.

[maritzasoto]

for your example g(y)= the square roots of y-6. would interval notation look like [6, infinity) ?

[smk]

The math: 0:05

Me: blinks once

the math 6:30

[the_ghost_eater]

how is it that greater than or equal to 6 is considered negative when the equation is y -6 ?