Understanding Functions Pt 1

[MizzSmilezz]

WOW. GOOD EXPLANATION RIGHT THERE.

[Romeodxb]

I am studying alone, and these video are very helpful for me. Thanks indeed.

[helpingyouwithmath]

f(x) means Y

[Nejisgirl123456]

You've taught me more than I've learned in class today. 

[kb100]

This is a good explanation.

I think kids should be introduced to multivariable functions as early as possible so I thought you did that well.

Although, one thing you left out that I think is important is that just because x and y are in the function, that doesnt mean you have to lable it f(x,y), x or y could be a constant or variable-constant and in that case you would just call it just f(x) or f(y).

[log6778]

I always associated the letter "f" with the word "function" (which I assume is why it is used.) So instead of saying "'f' of 'x' equals..." you say "the function of (variable) 'x' equals..." Obviously you can still use anything else in it's place; this just helped me when I was learning.

[luvhilaryduff34]

omg! i have a test on this tommorow and ur just a life saver!! SUBSCRIBED, ADDED, 5 STARS!!

[jjhk07]

you are amazing.

[Sawer888]

You are great!!!

[5edwin]

it is great

[LittleFolk]

hahaha, banana pie...

[SamB1045]

I've got my exam tomorrow and just want to thank you as your videos have really cleared up some of the things I wern't to sure on.

[MyOverflow]

I already knew functions before going into Calculus from programming.

int pie(int y)

{ int result = 4 * pow(y,2) + 2 * y; return result;

}

int main( int argc, char *argv[])

{ int y = 5; printf(pie(y));

}

If I include the "cmath" library in C++, that program would work just like: pie(y) = 4y^2 + 2y (in this case, pie(5) = 110)

It's funny how I learn a lot of "advanced" math (Calculus, etc.) while programming as a 12 year old.

[otherside65]

ignoramus

[MyOverflow]

@otherside65:

What was that about?

You see the argument I had on my page?

[kv8188a]

I'm a math teacher and I've watched a bunch of your 60 second videos. They are great. Thanks for making them.

[foka1977]

why there are allways morons trying to disbelief the work of someone who uses their time to teach others?

[jeweladdiction]

Wouldn't it help tremendously to explain the *role* of variables? And also to give some examples of common functions such as addition, constant functions, etc.?

It might be helpful to draw out in more detail the distinction between a function expression (of some language) and the function which it denotes (if it denotes any).

[mephatboi]

u contradict yourself in part 2:

here u say u can put whatever for f, (like "banana" or "pie")

but u also say that "pie" must specify exactly the variables in the function, i.e. it should say, pie (y, z)

in other words, u can't say pie (w, i) or pie (moon, earth), b/c the variables are y and z

but then in Part 2, u substitute the variable p for x

what gives? (doubt u will respond, but then again, all u can say is, "i screwed up")

[MrMakaveli58]

Definitely would love 2 see more vidz:)

[Ninah01]

thankyou for explaining in a clear and concise way!

[zuzulka]

ahahaha, never thought of that, but now I know, love it.

[ebpm4life]

that was 99 seconds......... i want my money back

[WintersHigh666]

Decent math lesson; however, you'll confuse the foreign language learners with "Pe." They're likely to assume it's a special math symbol. It should be "pie."

[spritefish]

He did write "Pie", and explained what it meant. just grouped the "i" close to the "e".

[tinytiby]

thank you

[Curse274]

Concise and clear.