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(c) If is expressible as a product of elementary matrices, then the homogeneous linear
system has only the trivial solution.
(d) If A is a singular matrix, and B results by interchanging two rows of A, then B may or
may not be singular.
Do you think that there is a matrix A such that
24.
for all values of a, b, c, and d? Explain your reasoning.
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