CUET CUET Mathematics 2024 - For a square matrix A_n x n (A) |adj A|=|A|^n-1 (B) |A|=|adj A|^n-1 (C) A(adj A)=|A| (D) |A^-1|=1|~A| | PYQs + Solutions | AfterBoards
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CUET Mathematics 2024 PYQs

CUET Mathematics 2024

Algebra
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Matrices & Determinants

Easy

For a square matrix An×nA_{n \times n}
(A) adjA=An1|\operatorname{adj} \mathrm{A}|=|\mathrm{A}|^{\mathrm{n}-1}
(B) A=adjAn1|\mathrm{A}|=|\operatorname{adj} \mathrm{A}|^{\mathrm{n}-1}
(C) A(adjA)=A\mathrm{A}(\operatorname{adj} \mathrm{A})=|\mathrm{A}|
(D) A1=1 A\left|\mathrm{A}^{-1}\right|=\frac{1}{|\mathrm{~A}|}

Correct Option: 2
Will be added.

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