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Science Bowl Question

📅 NSB Round Robin 2009🎓 HS🔄 Round 12#️⃣ Question 11❓ TOSS-UP📝 Multiple Choice

Which of the following is NOT true of matrices:

W) a square matrix that has an inverse is called invertible
X) a matrix does not have to have an inverse
Y) a matrix that does not have an inverse is called non-singular
Z) a matrix must be square in order to have an inverse
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