Matlab Question I don\'t understand what does the sentence \" solve Ax = b for t

Question

Matlab Question

I don't understand what does the sentence " solve Ax = b for three different vectors b generated by rand" mean

I wrote:

A = rand(4);

b = rand(4,1);

[L,U,P] = lu(A);

x = A

is that right?

Thanks

blem 1. Use the rand command to generate a 4 x 4 matrix called A Use lu to decompose A into L, U, and P. Use this decomposition to solve Ar b for three different vectors b generated by rand. To get credit for this problem, you must use the L decomposition and not a direct solution or matrix inversion.

Explanation / Answer

A = rand(4);
b = rand(4,1);
[L,U,P] = lu(A);
x = A

% x = A/b would solve the equation Ax = b.

% sample output

%x =

%-0.63046   %1.01124 % -1.06689 % 1.50575

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