Now solved: In 1-20, use either Gaussian elimination or Gauss-Jordan elimination to
Chapter 8, Problem 20(choose chapter or problem)
In 1-20, use either Gaussian elimination or Gauss-Jordan elimination to solve the given system or show that no solution exists.X1 + 2x2 + X4 = 0 4x1 + 9x2 + x3 + 12x4 = 0 3x1 + 9x2 + 6x3 + 21x4 = 0 x1 + 3x2 + x3 + 9x4 = 0
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