True or false? 1. If det(A)=0 then A=0. 4. If det(A) = 3  then det(2A) = 6. 5. If A is a 2x2 matrix with zero determinant, then one column of A must be a multiple of the other one.



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Posted on (Answer #1)

Det(A)=0 does not mean A=0


`|A|=0 `

`` But  A`!=0`





`!=2` det(A)



One column is multiple of the other.

We need more observation.

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