Ononot — Let A be a 3 \times 3 matrix with \det(A) = 4 and eigenvalue

Eigenvalues & Eigenvectorshard

0:00.0

Let $A$ be a $3 \times 3$ matrix with $\det(A) = 4$ and eigenvalues $1, 1, 4$ . What is the geometric multiplicity of $\lambda = 1$ if the matrix is NOT diagonalizable?