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Eigenvalues and diagonalisation
Diagonalisable or not?
MCQ
Is the matrix [[1, 1], [0, 1]] diagonalisable?
Possible answers
Yes, because it has the eigenvalue
1
1
1
No, because its eigenspace has dimension
1
1
1
for a double eigenvalue
No, because it has no real eigenvalue
Yes, because every triangular matrix is symmetric and therefore diagonalisable
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