Solve the system of equations using Cramer's Rule x+y+z=9,2x​+5y+7z=52,​.2x+y-z=0.

i want code for it

[James Tursa]

What have you done so far? What specific problems are you having with your code? You can look here for the algorithm:

https://en.wikipedia.org/wiki/Cramer's_rule

So you will need to know how to replace columns in a matrix, how to take determinant of a matrix, and how to write a for-loop.

[Les Beckham]

You should read this: https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

You will get much more help if you show that you have at least tried to solve your problem. You are less likely to get help if it appears that you are asking the volunteers here to solve your problem (or do your homework) for you.

Do you know how to write that system of equations in a matrix form (on paper)? That is an important step in understanding this problem.

[M.BHARGAV ram]

yes i know to write on paper but i don't know to do code

[David Hill]

Here is a start

A=[1 1 1;2 5 7; .2 1 -1];
b=[9;52;0];
x(1)=det([b,A(:,2:3)])/det(A);

[David Hill]

Ask a specific question. Show us what you are trying.

[Steven Lord]

Since this is a homework assignment, show us the code you've written to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance. [If it's not homework, just solve the system using the \ operator.]

If you aren't sure where to start because you're not familiar with how to write MATLAB code, I suggest you start with the MATLAB Onramp tutorial (https://www.mathworks.com/support/learn-with-matlab-tutorials.html) to quickly learn the essentials of MATLAB.

If you aren't sure where to start because you're not familiar with the mathematics you'll need to solve the problem, I recommend asking your professor and/or teaching assistant for help.

Answer 1

[James Tursa]

Original question:

Solve the system of equations using Cramer's Rule x+y+z=9,2x+5y+7z=52,.2x+y-z=0.

i want code for it

And the outline:

Did you read the algorithm description on the link I posted? The elements are as follows according to this link using the notation from the link:

Where is the matrix formed by replacing the i'th column of A by the column vector b.

You simply need to write a for-loop for this to calculate each according to the above. So your loop would look like this:

for i=1:_____

Ai = _____

x(i) = _____

end

You need to fill in the blanks.