Q29 of 98 Page 314

If A=is not invertible then λ=?

│A│=0

1(2 x 1 – 5 x1) - (1 x 1 – 5 x 2) + 2 ( 1x1 – 2x 2) = 0

-3+9 λ -6 = 0

9 λ = 9

λ = 1

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

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

If A=then A^-1=?

The matrix A=is