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+//page 38

+//Example 2.10

+clear;

+clc;

+close;

+A = [1 2 0 3 0;0 0 1 4 0;0 0 0 0 1];

+disp(A,'A = ');

+disp('The subspace of F^5 spanned by a1 a2 a3(row vectors of A) is called row space of A.');

+a1 = A(1,:);

+a2 = A(2,:);

+a3 = A(3,:);

+disp(a1,'a1 = ');

+disp(a2,'a2 = ');

+disp(a3,'a3 = ');

+disp('And, it is also the row space of B.');

+B = [1 2 0 3 0;0 0 1 4 0;0 0 0 0 1;-4 -8 1 -8 0];

+disp(B,'B = ');

+//end