Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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And there's also my own channel, LearnMathsFree

Hmm, I watched your channel and some of the videos there, and i see you have exactly copied Salman Khan(the creator of Khan Academy). Are those videos made by you? Hmm, they are not so bad, they are good.

though it is nowhere near as refined or as popular as the ones you mention.

Don't lose hope, I already see 480 subscribers. Keep posting and advertising your videos and it will soon be popular too.

**as interesting as the above ones** and many of the recent videos cost money, which is out of my reach.

**iamaditya**- Replies: 5

Hi everyone,

I was wondering about those youtube channels from where I learn things or visit regularly, to share in this forum. This forum has been my everything, where I could share more freely any interesting thing I find apart from facebook or whatsapp. After watching some videos on Trigonometry in Khan Academy, I wondered to share some of those channels which I have discovered after much research and I hope you like it too. So here are they:-

** Physics Videos by Eugene Khutoryansky** -Physics & some Maths

...And there are many more. I will be sending the other channels soon.

*Note-Channels marked * are available in Hindi language only.*

zetafunc wrote:

iamaditya wrote:Hi,

When we represent a point on a graph we always write it as (x,y) where x is the distance fro the horizantal x-axis and y is the distance from the vertical y-axis. Here, the point (2,3) is 2 units away from x-axis and 3 units away from y-axis. Hence the distance of the pt. from y axis is 3.

You have that the wrong way round -- x represents the distance from the y-axis, and y represents the distance from the x-axis (so (2,3) is 2 units away from the y-axis, not the x-axis).

Hmm, Thnx for correcting me. I often get confused between the 2.

Hi,

When we represent a point on a graph we always write it as (x,y) where x is the distance fro the horizantal x-axis and y is the distance from the vertical y-axis. Here, the point (2,3) is 2 units away from x-axis and 3 units away from y-axis. Hence the distance of the pt. from y axis is 3.

ganesh wrote:

Hi iamaditya,

Thanks for the views and comments. Regarding making it 'Sticky', MathsIsFun decides.

Cant moderators make an article a "sticky" one. Well if not then I'm sure bobbym can do it.

P.S.-Again an excellent article. Is this ur hobby,ganesh to find good information and write about it. If yes, then keep it up!

Another doubt: There is a section in MIFF named "Ganesh's Puzzles". I thought you created it, but now I think MIF did. Am I right? If yes then ask him to create anothet section.....

Where you can store these articles in various topics such as Singers, dancers, musicians, scientists and so on. Eventually you will set up another Wikipedia here!

bobbym wrote:

I am not a hero, I am just a guy that is trying to get through a day without messing up so badly. It is difficult to do even in my best fields.

hmm good, now as you saw that your bumpkin-lie is caught, so now you are not describing yourself as bumpkin anymore.

hmm, you are right bobbym. We should. Proud of you

Hmm its okay.

But you just now told me that he is a fraud. Then how did you know?

Oh..oh I'm sorry.

**openly** without any fear. I would not mind anything.

Hi Ganesh,

Its an excellent article, which I discovered just after you posted the above message and it came in the top. Hi, I would suggest you to make this article "Sticky" here so that it gets locked in the top and any new member(and any old one too if they have not seen it) can come and see these interesting information.

You mean a stupid person?

Hmm, then I will compare myself with Albert Einstein.

bob bundy wrote:

hi Zeeshan 01

It is possible to show that all quadratics have a line of symmetry, and that for ones of the form y = ax^2 + bx + c this will be a verttical line.

If we start with the quadratic formula for the two roots:

it should be obvious that the two roots are symmetrically placed either side of the line

so the maximum will not be at

as you ask in post 31

Bob

Hmmm, but as far as I know, the max and min value of a quadratic polynomial is when the value of x is

. Check the link above.Hi;

Shrimpy wrote:

Why is the equation of the circle different from what I got when I expanded (x – h)^2 + (y – k)^2 = r^2?

It is an equation of a circle at a point (h,k). If you want an circle at the origin [(0,0)] then h and k are both 0 and hence the equation is x^2-y^2=r^2.

Why, isn't being above average a nice thing?

Ok I'll later, when I will get some time.

You can jot the value of -b/a instead of x in ax²+bx+c and can see it yourself.

Hi Zeeshan 01,

It is a great problem for us to solve problems if you use symbols like that so Plz Zeeshan, I would recommend you to either use the Unicode characters in the normal text or Latex, in here, which is mainly meant for writing mathematical expressions.

Zeeshan 01 wrote:

Hmm, you need to find the max. and min. value of a quadratic equation. The max value of a quadratic equation is as follows:

a>0-∞

a<0--D/4a

a>1-∞

a>2-∞What is this how you do this???

And question 1 ans is it is not a function!!!!!!

Sorry for the late reply but you may visit this site:https://brilliant.org/wiki/maximum-valu … -equation/