If A is a singular matrix, then A (adj A) is a. - Vidyadip

MCQ

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

A
scalar matrix
✓
zero matrix
C
identity matrix
D
orthogonal matrix

✓

Answer

Correct option: B.

zero matrix

Given A is a singular matrix.

⇒ ∣A∣ = 0

A(adjA) = ∣A∣ I = 0I = O

∴ A(adjA) is a zero matrix.

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