initial commit / add all books

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diff --git a/22/CH10/EX10.7/ch10ex7.sce b/22/CH10/EX10.7/ch10ex7.sce
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+//signals and systems

+//state space

+//time domain method to find the state vector

+clc;

+clf;

+s=poly(0,'s');

+A=[s+12 -2/3; 36 s+1];

+y=roots(det(A))

+t=poly(0,'t');

+beta=inv([1 y(1); 1 y(2)])*[%e^-y(1)*t; %e^-y(2)*t];

+disp(beta)

+size(beta)

+W=beta(1)*[1 0;0 1]+ beta(2)*[-12 2/3;-36 -1];

+zir=W*[2;1];

+disp(zir);

+zsr=W*[1/3;1];

+disp(zsr);

+total=zir+zsr;

+disp(total);