Pages: [1]   Go Down
Author Topic: Isolating r from this equation  (Read 3625 times)
0 Members and 1 Guest are viewing this topic.
Mairkina City, Philippines
Offline Offline
Newbie
*
Karma: 0
Posts: 18
Why don't you learn something today?
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi Arduino people!

Can you please isolate the variable r and simplify this equation (attached)? Don't worry it's not my homework. I tried Microsoft Mathematics to simplify but it can't. I don't have Mathematica so I can't use that.

I need this equation for my project in Arduino. I can't put it into my code.  smiley-sad-blue

Your help is appreciated. If this equation works I will share it here.  smiley-grin


* leequation.GIF (7.41 KB, 1225x101 - viewed 108 times.)
Logged

Global Moderator
Netherlands
Offline Offline
Shannon Member
*****
Karma: 212
Posts: 13531
In theory there is no difference between theory and practice, however in practice there are many...
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

imho it is impossible to extract r from the equation. 
think there might be a  solution for   r== infinity.  as that removes all x y and z parts

you could make a first step by defining d= (x^2)/(2x r^2); similar for y and z

Where does this formula comes from?
Logged

Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

Offline Offline
Newbie
*
Karma: 0
Posts: 4
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi Arduino people!

Can you please isolate the variable r and simplify this equation (attached)? Don't worry it's not my homework. I tried Microsoft Mathematics to simplify but it can't. I don't have Mathematica so I can't use that.

I need this equation for my project in Arduino. I can't put it into my code.  smiley-sad-blue

Your help is appreciated. If this equation works I will share it here.  smiley-grin
The first you can do is to Reduct to a common denominator.
Logged

Central MN, USA
Offline Offline
Tesla Member
***
Karma: 72
Posts: 7176
Phi_prompt, phi_interfaces, phi-2 shields, phi-panels
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Are you trying to solve r with given x,y,z? Do you know if it is solvable and how many roots r has? The original question that spawned this equation would answer some of the questions I/we have.
Logged


Offline Offline
Newbie
*
Karma: 0
Posts: 16
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I thought i could help, so i plugged it into maple, but it cant solve it. Maybe with more information it could.
Logged

Global Moderator
Netherlands
Offline Offline
Shannon Member
*****
Karma: 212
Posts: 13531
In theory there is no difference between theory and practice, however in practice there are many...
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

The OP did not answered the question yet where the formula comes from (see post 2)

From the vars in the formula I guess it is a sort of 3d - distance function ?
Logged

Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

Pages: [1]   Go Up
Jump to: