Let A = (a(ij)(3xx2) be a 3xx2 matrix w...

Let A = `(a_(ij)_(3xx2) ` be a `3xx2` matrix with real entries and B = AA. Then

`B^(-1)` is a `3xx3` matrix

`B^(-1)` is a `2xx2` matrix

`B^(-1)` does not exist

`B^(-1)` exists if and only if exactly one row of A consists of zeros

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