Guess the Formula!

[imaketouchtheme]

Just thought I'd create a thread where you try to guess a formula (one that's known widely) from the poster above you. If you correctly guess, you can then post one for the next person to guess. Also, no Googling!

Formula:

x(t)=x_0∙e^kt=x_0∙e^(t/τ )=x_0∙2^(t/T)=x_0∙(1+r/100) ^(t/p)

 

[Shaun.P]

What an intriguing idea for a thread.

I'm in my second year of a maths degree. This formula does not look familiar.

 

[119576]

That one's exponential growth- correct?

 

[imaketouchtheme]

That one's exponential growth- correct?

Got it! Now it's your turn to post a formula if you would like.

 

[119576]

pi(x) ~ x/logx

a nice easy one I think.

 

[fireshot91]

Logarithm?

 

[eldy]

that's the formula for being a 40 year old virgin.

 

[KompleX]

pi(x) ~ x/logx

a nice easy one I think.

the number of primes less than or equal to x.

here is one that nobody will be able to figure out! muhahaha!!

(1/2)(base)(height)

 

[jmann]

the number of primes less than or equal to x.

here is one that nobody will be able to figure out! muhahaha!!

(1/2)(base)(height)

Area of a triangle?

how about this?

 

[minicoop503]

area of a triangle!!

easy..

x = (b^2 +- sqrt(b^2 - 4ac))/2a

 

[paolo-]

edit posted at the same time as mini ^^^ well that's the equation to solve a quadratic equation. and jmann to, that's the equation of rate of a slope.

the number of primes less than or equal to x.

here is one that nobody will be able to figure out! muhahaha!!

(1/2)(base)(height)

Area of a triangle, c'mon...

keeping with the easy one,

PV=NRT

I sadly know most of my equations only in french, don't want to verify them in english.

 

[minicoop503]

edit posted at the same time as mini ^^^ well that's the equation to solve a quadratic equation.

Area of a triangle, c'mon...

keeping with the easy one,

PV=NRT

I sadly know most of my equations only in french, don't want to verify them in english.

ideal gas law

 

[r.j.s]

...

 

[Shaun.P]

how about this?

Gradient of a straight line.

 

[Shaun.P]

area of a triangle!!

easy..

x = (b^2 +- sqrt(b^2 - 4ac))/2a

The Quadratic Formula

Edit: Wait isn't it -b not b^2?

 

[Shaun.P]

...

Wavelength?

 

[mickbab]

The Quadratic Formula

Edit: Wait isn't it -b not b^2?

I do believe you are right.

 

[r.j.s]

Wavelength?

Bingo. You win a cookie.

 

[miles01110]

Here's a good one.

 

[fireshot91]

Area of a triangle?

how about this?

Slope formula.

EDIT: He said Gradient of a line..I'm guessing its the same thing?

 

[imaketouchtheme]

Here's a good one.

Please enlighten us, I have no clue whatsoever.

 

[theyoda3]

Here's a good one.

Klein-Gordon Equation

Give this a try, it's pretty neat.

 

[imaketouchtheme]

Klein-Gordon Equation

Give this a try, it's pretty neat.

Some kind of sinc function.

Yea, I have no clue and I don't think anyone else does either. Let us know?

 

[imaketouchtheme]

Anyone else want to post some equations. We will all be smarter.

 

[lancestraz]