• Book	Advanced Engineering Mathematics
  Author	Erwin Kreyszig
  Edition	8th Edition

code_begins

a,k = var('a,k')

A = matrix([[a,k,k],[k,a,k],[k,k,a]])

print A

A.characteristic_polynomial()

A.eigenvalues()

# all the eigenvalues are real => the matrix is symmetric, if a, k are real.

code_ends

• Solution by:

  • ganesh, developer, space
  • bhanukiran, student, technical university of Delft
  • saransh, student, sobhit university
  • ujwala, lecturer, aurangabad