in Linear Algebra edited by
0 votes
0 votes

Consider a $3×3$ real symmetric matrix S such that two of its eigenvalues are $a\neq 0$, $b\neq 0$ with respective eigenvectors $\begin{bmatrix} x_1\\ x_2\\ x_3 \end{bmatrix}$, $\begin{bmatrix} y_1\\ y_2\\ y_3 \end{bmatrix}$ If $a\neq b$ then $x_1y_1+x_2y_2+x_3y_3$ equals

  1. $a$
  2. $b$
  3. $ab$
  4. $0$
in Linear Algebra edited by
by
27.4k points

Please log in or register to answer this question.

Answer:

Related questions