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If A is a square matrix of order 3, then...

If A is a square matrix of order 3, then the true statement is (where `I` is unit matrix) (1) `det (-A)=-det A` (2) `det A=0` (3) `det (A+I)=1+det A` (4) `det (2A)=2 det A`

A

det (–A) = –det A

B

det A = 0

C

det (A + l) = 1 + det A

D

det 2A = 2 det A

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