A is real matrix from order nXn. We know that A gives : $<Av,v>=0$ for v vector in $R^n$.
So what must exist?
- Every eigenvalue of A is real.
- A is not Invertible
- A is Hermitian
- A is not Hermitian
- all answers are incorrect
I think 2 is the right answer ( can be more than 1 answer that are true) but im not sure