The system of homogeneous equations
has non-trivial solutions for
, then the value(s) of t for which inverse of Atdoes not exist.
If A2 = I, then value of
If a is a 3 × 3 skew summertic matrix with real entries and trace of A2equals zero, then
If A is 2 × 2 matrix such that A2 = O, then tr (A) is