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

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**Ultima Black Gate**- Replies: 1

Hey guys check out this cool youtube video. It features many guitar players from all over the world, jamming (soloing) over a backing track. Each one adding his personal style to the composition. Enjoy!

http://www.youtube.com/watch?v=3QumBfe2jqw

**Ultima Black Gate**- Replies: 1

Hi guys this is my videogame music channel on youtube, check it out

http://www.youtube.com/user/SixStringsGeek

Cya around! **Math ftw!**

PD: I'm taking cover suggestions, so if you have a favourite game music, name it and maybe i'll cover it.

**Ultima Black Gate**- Replies: 0

Check it out

http://www.youtube.com/watch?v=Ws2Pxl5CmMo

Alyssa_96 wrote:

Hola me llamo alyssa. i necesidad sitios web para que me ayude a aprender a hablar español. ¿Alguna sugerencia?

La forma correcta es:

Necesito sitios web que me ayudeN a aprender (a hablar) español.

PD: I speak spanish.

MathsIsFun wrote:

Wow ... !

I´m glad you enjoyed it, thanks for visiting. :):):)

**Ultima Black Gate**- Replies: 2

Heres a solo improvisation of mine:

http://www.youtube.com/watch?v=dpKPpZSWP1w

Hope you like it. See ya!

**Ultima Black Gate**- Replies: 0

Sorry for the repost, but I forgot to say that im just a few days away from the exam, and I couldnt modify the title of the other post..

Step by step answers to this conic sections problems will be appreciated.thankx!

. Find the equation of an ellipse that goes through point P(6, 64/10), semimajor axis is proportional to 5 and semiminor axis is proportional to 4.

. Find equation of an hyperbola with excentricity (5/3) and goes through point P(10, 32/3).

. Find equation of an hyperbola that goes through points A(4, sqrt6) & B(12, 6sqrt2).

. An equilateral hyperbola goes through point P(3, sqrt5). Find equation.

**Ultima Black Gate**- Replies: 0

Step by step answers to this conic sections problems will be appreciated.

. Find the equation of an ellipse that goes through point P(6, 64/10), semimajor axis is proportional to 5 and semiminor axis is proportional to 4.

. Find equation of an hyperbola with excentricity (5/3) and goes through point P(10, 32/3).

. Find equation of an hyperbola that goes through points A(4, sqrt6) & B(12, 6sqrt2).

. An equilateral hyperbola goes through point P(3, sqrt5). Find equation.

The answer is correct.Thanks Mr. Franklin.

**Ultima Black Gate**- Replies: 2

Hi guys I got this problem at a test and I couldnt solve it....

Find the equation of a parabola of vertical axis which has the points A(1,8) B(-2,-1) C(-3,8). Find the coordinates of the vertex.

Well heres what I did, I know that the formula of the parabola of center (h,k) is [(x-h)^2=4p(y-k)] so i noticed that points A & C have the same y-coordenate, so the right part of the eq would be equal. I then wrote (1-h)^2 = ( -3-h)^2 and from there I got a value of h.

Then I replaced that value on the other system of eqs I made with A & B to get k. After that I had p as the last unknown and it was easy to find on a third sys of 2 eqs.

Maybe I made some wrong mental calculations but my answer was not ok, and I wanted to know If at least the algorithm I tried to use is ok.

Thanx in advance!

**Ultima Black Gate**- Replies: 3

Hi guys, I have to do a Conic Sections work for college, using one of these two languages.

Which one is easier to (learn to) use, or at least which should I pick up for this geometry subject?

Thx in advance

Devanté wrote:

Very good, Ultima. I have met someone else who plays guitar.

Im glad you like it:).

which style do you play?

MathsIsFun wrote:

Interesting points. Yes, I get a "feeling" that something is going in the right direction. But the feeling CAN be wrong. It is like I have a rough model of the problem in my mind, but actually working on the problem can change it.

And I think intuition plays a bigger role in mathematical discovery than people admit. I remember some mathematician said (something like): "the idea hit me when I was in the bus. It then took me months to make it look like I got there in logical steps."

Yes, same for me, sometimes the feeling is actually wrong, but it gives me a sense of control over the problem and motivation to solve it.

**Ultima Black Gate**- Replies: 9

I uploaded a random electric guitar solo to youtube.

Check it out.

http://www.youtube.com/watch?v=vglBbSmlUa8

**Ultima Black Gate**- Replies: 8

I was wondering if something like a math intuition exists, I mean something like having a feel that you are getting to the solution of a hard problem or when trying to solve a hard problem and you somehow "feel" when you are on the right track (or in a wrong one) and finally solve it.

It happens to me when writing in paper some math puzzles that I have in my mind.

I noticed that after practising mental maths skills and memorizing new formulas for known concepts (different ways of showing equivalences) this intuition seems to get more clear.

It kinda knowing in advance wether knowing an approach to the problem will work or not by checking different insights.

Have you ever experienced this?

**Ultima Black Gate**- Replies: 7

Maybe this post is a bit vague, but i want to know as much as I can about general real world use for advanced math subjects like abstract algebra, category theory, number theory, optimization, topology, funcional analysis, game theory any math-subject you may want to post.

Regarding purely theorical (no real world use) math... does such a thing exist?

im a newbie with advanced math, but im getting more and more interested.

Any replies will be appreciated.

*Post moved to Euler Avenue - Ricky*

**Ultima Black Gate**- Replies: 2

What are complex numbers for anyway?

I know they are (a + bi) where a and b are real numbers and i is imaginary (-1 square root) and i know how to do basic operations with them but what are they used for?

Im a newbie with this, and the concept is very weird for me, not regarding HOW but regarding WHY studying complex numbers.

Basically any interesting info that you guys could share with me will be apreciated.

.

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