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find unknown value in matrix using MATLAB [closed]

Date: 2022-11-29 11:33:29 

 a= 1-b    -1        0;
   -1    3-1.5b    -2;
    0     -2      5-2b

if determinant of matrix a equal zero, then whats the value of b? If the matrix is 6 by 6,then what will be process? Please write the instruction in MATLAB. 

Answers: 

With the definition of the determinant, you can reformulate the problem as finding the roots of an nth polynomial. Either do it by hand (easy for the 3x3 case) or use the symbolic math toolbox to do it. Then you can use the MATLAB roots function to solve it. 

 


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