Question: Which number d forces a row exchange, and what is the triangular system (not singular) for that d? Which d makes this system singular

Which number d forces a row exchange, and what is the triangular

Which number d forces a row exchange, and what is the triangular system (not singular) for that d? Which d makes this system singular (no third pivot)? 2x+5y + z = 0 4x+dy+z=2 V.7 3

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