If A is a singular matrix, then A (adj A) is a 1. scalar matrix 2… - Vidyadip

Question

If A is a singular matrix, then A (adj A) is a

scalar matrix
zero matrix
identity matrix
orthogonal matrix

✓

Answer

zero matrix

Solution
Given A is a singular matrix.
⇒ ∣A∣ = 0
A (adjA) = ∣A∣I = 0I = O
∴ A (adjA) is a zero matrix.

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