How to solve a 5x5 matrix in Matlab?

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Ahmed Saeed Mansour
评论： Ahmed Saeed Mansour 2019-8-9
Hello, I have a 5x5 matrix and I wanna slove it...Any help please?
Thank you !
A=[1 1 -1 4 5 ; 0 1 3 5 6 ; -1 0 -2 8 7 ]
b=[9;3;2;6;7]
  2 个评论
Walter Roberson
Walter Roberson 2019-8-8
That looks like a 3 x 5 matrix for A, not a 5 x 5.
Ahmed Saeed Mansour
Ahmed Saeed Mansour 2019-8-9
I am sorry, you are right, here is the correct matrix:
A=[300 -100 0 0 0 ; -100 200 -100 0 0 ; 0 -100 200 -100 0; 0 0 -100 200 -100; 0 0 0 -100 300 ]
b=[20000;0;0;0;80000]
A\b
And after reading the answers here, I got the solution, thank you so much !

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Walter Roberson
Walter Roberson 2019-8-8
A\b

更多回答（1 个）

the cyclist
the cyclist 2019-8-8
编辑：the cyclist 2019-8-8
A\b
Take a look at this documentation. Does that do what you want?

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