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A matrix has 5 columns.

One of the columns is all zeros.

Two of the columns have leading ones.

So the remaining 2 are linearly dependent in the matrix.

My question is. What is the nullity of the matrix?

My book would say 3 BUT the dimension of the null space is this matrix is 2 right?

So shouldn't the nullity be 2?

Thanks

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# Nullity of a Matrix

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