Cramer's rule applies to a system of linear equations only when:
Athe coefficient determinant is non-zero
Bthe coefficient determinant is zero
Cthe equations are homogeneous
Dthere are more unknowns than equations
Answer & Solution
Correct answer: A. the coefficient determinant is non-zero
Cramer's rule requires |A| ≠ 0 to obtain a unique solution.
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