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

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#101 Re: Help Me ! » Quick calculus question » 2015-02-18 08:33:18

Yes, you're right, I forgot to take the square root for V.

#103 Re: Dark Discussions at Cafe Infinity » Words that contain AEIOU, in any order, each vowel exactly once » 2015-02-17 21:12:56

JaneFairfax wrote:

OUEAI
counteracting
counterchanging
countercharging
counterclaim
countermanding
countermarching
countershading
counterstain
countervail
documentarily
housemaid
mountebanking
outeating
outleaping
outreaching
outspeaking
outspreading
outwearing

countenancing

#106 Re: Help Me ! » I'm stuck algebraically proving this function is odd. » 2015-02-12 20:28:37

CIV wrote:

Is this right? When I pull the negative sign, I don't change the signs of the term within the square root right?

That is correct. up

#109 Re: Help Me ! » Maxima and minima » 2015-02-10 21:25:47

If the gradient of the line is m (<0) its equation is
. Now find OA and OB in terms of m, a and b.

The problem is now to treat m as a variable find the value of it that minimizes OA+OB.

Similarly for the triangle, find the value of m that minimizes (OA·OB)/2.

#114 Re: Dark Discussions at Cafe Infinity » Words that contain AEIOU, in any order, each vowel exactly once » 2015-02-07 05:20:36

JaneFairfax wrote:

EUAIO
crenulation
degustation
denudation
deputation
despumation
detruncation
education
emulation
encrustation
equation
eructation
exculpation
exhumation
expurgation
exudation
exultation
menstruation
mensuration
mercuration
peculation
permutation
persuasion
perturbation
refutation
regulation
reputation
speculation
sternutation

fecundation
neuration

#115 Re: Help Me ! » Last two digits » 2015-02-01 00:37:14

Direct calculation gives

[list=*]
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#118 Re: Help Me ! » problem with LaTeX » 2015-01-30 05:40:59

Try this.

\Delta=\frac12

h=c\cos A

#123 Re: Jokes » Limericks » 2015-01-25 00:18:50

There once was a prophet from Fife
Who predicted the end of his life.
    As the moment drew near
    He showed no sign of fear
As he stabbed himself with a knife.

#124 Re: Jokes » Very short jokes! » 2015-01-24 22:09:42

I like the chicken joke. big_smile

#125 Re: Maths Is Fun - Suggestions and Comments » Dimensions (Script) » 2015-01-23 21:20:53

MathsIsFun wrote:

Probably best I just don't mention time. Save it for another time smile

Instead you could probably mention dimensions in vector spaces, which are a generalization of the three spatial dimensions of Euclidean geometry. An example of a vector space of dimension n is
.

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