Q27 of 98 Page 314

If A and B are two nonzero square matrices of the same order such that AB=0 then

s AB is a 0 matrix its determinant has to be 0.

So │AB│=│A││B│=0

So │A│=│B│=0

If A is an invertible square matrix then │A^-1│=?

If A and B are invertible matrices of the same order then (AB)^-1=?

If A is a square matrix such that │A│≠0 and A² – A + 2I = 0 then A^-1=?

If A=is not invertible then λ=?