Questions tagged [equation-solving]
763 questions
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votes
1 answer
Solving symbolic equation in matlab
I am trying to solve a symbolic equation of the form
D = lamda^12/339288145381785600000 + lamda^10/18124366740480000 +
lamda^8/7846046208000 + lamda^6/523908000 + lamda^4/25200
where lamda is declared as sym. The output I get is not in a…
-1
votes
2 answers
Calculate variable based on remainder
How do I use JavaScript to calculate the x value in this formula?
(x * y) % z = 1
y and z are known integers.
For example, y = 7, z = 20. 3 multiplied by 7 results into 21, that divided by 20 results into remainder of 1. Solution x = 3.
(3 * 7) %…
MikkoP
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2 answers
How to find shortest path in both directions of a number with over wrapping?
Let's say I have to pick a number from 0-10.
The number I pick is 6.
The next number I want to pick is 0.
Now the rules are I have to keep incrementing the number by 1 or decrementing it by 1, the number can also wrap around the last number.
Now…
SSpoke
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votes
1 answer
How to call exe on server from javascript?
Javascript is inaccurate, but I need a very precise answers to a quartic equation. I want to slove it with c++, that i compiled into an exe file and will update the answers in a javascript file that I include in the HTML. I need to run the exe file…
Ágoston Kis
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votes
1 answer
How can I get a KxK matrix in matlab?
In my assignment my lecturer wants me to write an equation solver in matlab but I need to get an input . Input will be the K in KxK matrix and I need to get K time(s) multiple of unknown. Let me know if there is an spesific operator for this.I…
tariktanriver
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votes
1 answer
Find analytic solution to this system of quadratic equations
I have reduced my problem to this system of 3 quadratic equations:
(k1*x + k2*y + k4)^2 = k7
(k2*y + k3*z + k5)^2 = k8
(k3*z + k1*x + k6)^2 = k9
(Solve for x, y, z, k1..k9 are constants)
I have spent quite some time not finding…
Peter Pohl
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votes
1 answer
Solving n linear systems efficiently
I have n (very large) independent linear systems (Ax = b_i). They all have the same A, but b_i is different for (i = 1, ..., n). I want to solve these n systems in parallel in CUDA.
I was thinking that it might be most efficient to do the LU…
Farzad
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votes
4 answers
How to solve an equation for 4 variables
Say I have
a + 3b + 4c +2d =40;
how can I solve a,b,c and d.
I'm not sure where to start, I am coding this using c language. I know that one solution is a=9 b=3 c=2 d=7.
I forgot to add that the domain for a,b,c,d is 0-29 inclusive.
mintxo
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votes
2 answers
Solve for value without using Solver
I currently have the following in excel for other users.
The Number column does not change. Users will input values in Multiplier 1 and Multiplier 2 columns and they will get a value in Outcome column.
Is there an automatically way where the user…
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votes
1 answer
Finding parameter of a parametric quadratic equation
Question: i'd like to write a little c program that finds parameter of a parametric quadratic equation like:
(k+2)x²+(k-2)x+k-2=0
If i want to find k for x1=-x2, how can i do? Is there a way to convert inserted string to mathematical operations(if i…
Saverio
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votes
2 answers
Solving simple linear function in R
I have two simple equations.
46.85 = r/k
8646.709 = r/(k^2)
I am trying to solve for r and k and I tried setting up my equations as follows
model <- function(r,k) { c(46.85 = r/k,
8646.709 = r/(k^2))}
ss <-…
Science11
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votes
1 answer
I keep getting zero from my equations and do not know why
Here is my full code. I keep getting zero for my equations no matter what i do. Any help would be greatly appreciated.
#include
#include
#include
int main(void)
{
int x, y;
float a,t;
//Inputs
printf("What is the…
jwloszek
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votes
1 answer
How to find point of intersection of two line segments in Python?
I have data with one independent variable x and two dependent variables y1 and y2 as shown below:
x y1 y2
-1.5 16.25 1.02
-1.25 17 1.03
-1 15 1.03
-0.75 9 1.09
-0.5 5.9 1.15
-0.25 5.2 1.17
0 …
sfactor
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votes
1 answer
How to find all A s and B s such that AB=constant
I have two numbers a and b such that a*a*b=constant. How can I find all as and bs which satisfies this equation?
Can I have a graph for example for a versus b?
Actually, I am looking for a relationship between a and b, as an example an equation for…
shaloo shaloo
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votes
1 answer
Is there any Good library for solving differentiation equations using differentiation operator?
Good library for solving differentiation equations (not only 1rst order) using differentiation operator?Better written in C/C++/PHP/C#/Actionscript/Javascript
Rella
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