For any invertible matrix A, which of the following is NOT true. Option 1: |A| ≠ 0 Option 2: (A')^-1 = (A^-1)' Option 3: (adjA)^-1 = |A|A Option 4: |A^-1| = |A|^-1

The answer is '(adjA)^-1 = |A|A'. View full solution:

CUET Mathematics - For any invertible matrix A, which of the following is NOT true. | PYQs + Solutions

CUET Mathematics 2026 21st May Shift 1

Algebra

Medium

core

$|A| \neq 0$

$(A')^{-1} = (A^{-1})'$

$(adjA)^{-1} = |A|A$

$|A^{-1}| = |A|^{-1}$

✅ Correct Option: 3