**True or false?**

**1.** If det(A)=0 then A=0.

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False: I.e

`[[1,4,7],[3,2,11],[8,5,29]]` is non zero matrix, but tis determinant is zero for the tirdh column si sum of 3 times first + second.

False.

Because

`A=[[2,3],[4,6]]`

`det(A)=0 `

`but`

`A!=0`

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