Given vectors u and v, make a tri-diagonal symmetric matrix such that u is in the main diagonal and v is below and above diagonal

u = [1 4 5 6]
v = [3 8 2]

the result would be:

[ 1     3     0     0
  3     4     8     0
  0     8     5     2
  0     0     2     6 ]
Solve

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Last Solution submitted on Feb 13, 2026

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Pauli Huusari Riccardo G. CXD Matthew Bolyard

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