True or false: (a) Performing an elementary row operation of type #1 does not change the eigenvalues
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(a) Performing an elementary row operation of type #1 does not change the eigenvalues of a matrix.
(b) Interchanging two rows of a matrix changes the sign of its eigenvalues.
(c) Multiplying one row of a matrix by a scalar multiplies one of its eigenvalues by the same scalar.
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