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Three points are collinear when the determinant of their coordinates is:

AZero
BOnee
CTwoo
DNine
Answer & Solution
Correct answer: A. Zero
1. The determinant gives twice the triangle's area. 2. Collinear points enclose no area. 3. So the determinant comes out zero. 4. The answer is zero. _Source: syllabus Mathematics, Ch 4 'Determinants'_
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