Math Is Fun Forum

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

You are not logged in.

#51 Exercises » Integral section » 2007-10-15 15:08:14

Krizalid
Replies: 1

Let's share nice integrals.

Here's the first one

I'll post a solution later.

#52 Re: Maths Is Fun - Suggestions and Comments » Image suggestion » 2007-10-15 15:02:00

Okay.

For example this inocent image

av1156tz9.jpg

Dimensions: 100 x 75

Size: 38,6 KB

#53 Maths Is Fun - Suggestions and Comments » Image suggestion » 2007-10-15 14:50:48

Krizalid
Replies: 22

An avatar is a small image that will be displayed under your username in your posts. It must not be any bigger than 80 x 80 pixels and 10240 bytes (10 KB).

Could be this changed a little bit?

Like 100 x 100 pixels and 40 KB?

#54 Re: Help Me ! » Trig Limit » 2007-10-15 14:37:56

Do we really need L'Hôpital's Rule?

What about if you multiply top & bottom by

?

#56 Maths Is Fun - Suggestions and Comments » New format » 2007-09-24 12:33:21

Krizalid
Replies: 5

Hello

Is there a way that the Administrator may change the forum into a new one like MathLinks or using Invision Power Board or vBulletin?

#57 Re: Help Me ! » integration » 2007-09-24 12:27:18

He used the "Integration by Parts".

#58 Re: Help Me ! » derivative of x^x » 2007-09-24 12:26:18

Another faster way it is to set

, then we get the derivative quickly.

#59 Re: Help Me ! » LaTeX question » 2007-09-06 14:59:28

{\raise0.5ex\hbox{$\scriptstyle 1$}
\kern-0.1em/\kern-0.15em
\lower0.25ex\hbox{$\scriptstyle 2$}}

Or

{\raise0.7ex\hbox{$1$} \!\mathord{\left/
{\vphantom {1 2}}\right.\kern-\nulldelimiterspace}
\!\lower0.7ex\hbox{$2$}}

Does that make sense?

#61 Re: Help Me ! » Differential Equation Help » 2007-08-13 13:49:21

Did you figure out if it's a Bernoulli or Ricatti's differential equation?

#62 Re: Help Me ! » separable equations » 2007-08-13 13:46:38

There're very simple.

The first one can be rewritten as follows:

Then all you have to do is integrate each side.

#63 Re: Help Me ! » Segments » 2007-08-13 13:32:44

Show a picture, may be useful.

#64 Re: Help Me ! » Integration » 2007-08-13 12:11:55

mikau wrote:

When its something of the form 4/[(x+5)(x+3)] dx, it usually involves partial fractions.

Well sometimes it can be avoided.

#65 Re: Help Me ! » inte » 2007-08-13 12:03:24

Not hard, it can be solved without integration techniques.

#66 Re: Help Me ! » a triangle » 2007-08-13 11:39:22

I know where you got this problem ^^

It's really nice, of course with a synthetic solution.

Not hard to find.

#67 Re: Help Me ! » triangle » 2007-08-13 11:36:44

Did you try Stewart's Theorem?

#68 Re: Exercises » Integral Marathon » 2007-07-16 12:19:35

I forgot to mention that don't post integrals which don't have a primitive function in elementary terms.

#69 Re: Exercises » Integral Marathon » 2007-07-12 04:26:22

mikau wrote:

sec(x) - tan(x) + x + C?

Sorry, you have to show us your solution (I dunno what I was thinking that I didn't ask you that).

JaneFairfax wrote:

Show your solution too.

JaneFairfax wrote:

Why not just differentiate back and check? Also, is there any need to use blatantly sexist language? shame

Well, actually when I was writing I didn't realize of that.

If you don't mind, please limit to make all type of disagreeable commentary. There're forms and forms to request the things.

#70 Re: Help Me ! » trigonometric integration » 2007-07-12 04:13:56

That's the incomplete Gamma function.

#71 Re: Exercises » Integral Marathon » 2007-07-11 15:09:15

That's correct.

You can post the next one.

#75 Maths Is Fun - Suggestions and Comments » Math button » 2007-07-11 14:24:09

Krizalid
Replies: 2

Is there a possibility to set a Math button?

I mean, a button which generates the tags [math] and [math]

Board footer

Powered by FluxBB