Math Is Fun Forum

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

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#326 Re: Dark Discussions at Cafe Infinity » 1 does not equal .999999..... » 2013-04-08 22:18:38

Have you fully explored whether m's law of the dots can be safely used after 9 extraction from dots?

#327 Re: Maths Is Fun - Suggestions and Comments » An error » 2013-04-03 09:16:27

Why stop at two? We need more!

(Note: odd errors like this are devilishly hard to fix, as you need to work out why they happen in the first place.)

#331 Re: Maths Is Fun - Suggestions and Comments » plus signs in Latex » 2013-03-20 08:12:05

Yes, and I can delete it manually, by looking up its cached name. Such as "f/f/29156445d5e534d194b44703db36ab1.gif" for the misbehaved image above.

#332 Re: Maths Is Fun - Suggestions and Comments » plus signs in Latex » 2013-03-19 22:57:06

To speed up page loads, once latex is created it is kept in a large cache. If latex was always being created things would be really slow.

So if you write some latex that has already been done you get that old version.

Try changing it a little (say with a space or variable change) and it will likely have to make a new one that works properly.

#336 Re: Maths Is Fun - Suggestions and Comments » Present Value » 2013-02-22 13:28:45

bob bundy wrote:

1.10 to power 6 is better than 1.10 x 1.10 x 1.10 x 1.10 x 1.10 x 1.10

Could you say is quicker to calculate ?

Quicker is better, so better will become quicker.

#337 Re: Maths Is Fun - Suggestions and Comments » Present Value » 2013-02-21 11:39:36

Well then, here is another (somewhat duplicated beginning): Net Present Value NPV

#341 Re: Maths Is Fun - Suggestions and Comments » Investment/Loan Graph » 2013-02-03 09:30:26

Thanks guys, will add explanations and links to relevant pages.

#342 Maths Is Fun - Suggestions and Comments » Investment/Loan Graph » 2013-02-02 22:13:28

MathsIsFun
Replies: 4

Working on a new Investment/Loan Graph

Does it make sense? Does it do the calcs correctly? Any suggestions?

#343 Re: Puzzles and Games » The King and his Four Cities. » 2013-01-31 18:49:51

I love it when nature solves mathematical puzzles for us!

Now if we could just get soap bubbles to solve traveling salesman problems ... hang on, is this remotely possible? Maybe being only 3-dimensional is a limiting factor.

#344 Re: Maths Is Fun - Suggestions and Comments » How would you spend ... » 2013-01-24 09:03:34

Videos are underway (gradually). And forum changes are not expensive, just risky (any change in software brings the potential to be hacked, it has happened in the past).

So we can't see anything worth throwing a lot of money at (assuming it was available) ?

#345 Maths Is Fun - Suggestions and Comments » How would you spend ... » 2013-01-23 11:36:59

MathsIsFun
Replies: 19

Hypothetically! If a grant of money were available to help online math education (possibly through mathsisfun.com, mathopolis.com or this forum) how would you spend it?

#347 Re: Maths Is Fun - Suggestions and Comments » Definite Integrals » 2013-01-22 15:34:46

Excellent, I will link to it from the main website now.

#348 Re: This is Cool » tau=2*pi » 2013-01-22 11:25:50

Maybe we could come up with an argument for pi/2. It is a "right" angle, so it must be right!

#349 Re: This is Cool » tau=2*pi » 2013-01-22 11:17:34

Perhaps tau would have been a better choice, but there are also arguments supporting pi. Area = pi r^2 for example. And some stats formulas have plain old pi in them.

#350 Maths Is Fun - Suggestions and Comments » Definite Integrals » 2013-01-22 09:20:44

MathsIsFun
Replies: 7

And here is my draft of Definite Integrals

Comments/Error Reports/Suggestions/etc please!

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