Determinant (5 problems)


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Expand by use of minors

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What’s the value of the following determinant?

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Prove that in any 3x3 determinant, if one row is 0, then the value of the determinant is zero.

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If two rows are interchanged, what is true of the resulting determinant?

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Use determinants to determine the number of solutions of the systems

(a)

(b)

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