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6.1 Consistent and Inconsistent Systems - Problems

  1. Classify these systems as either consistent or inconsistent. If the system is consistent, further categorize it as underdetermined or uniquely determined. Explain why the system fits into that category. Also, explain what this means graphically for each system.

    1. 2x1 + 3x2 = 9 and 3x1 + 41/2x2 = 13

    2. 3x1 + 4x2 = 7 and 9x1 + 12x2 = 21

    3. 2x1 + 3x2 = 8 and 3x1 + 4x2 = 11

    4. Ax = b where matrix and matrix

    5. Ax = b where matrix and matrix

    6. Ax = b where matrix and matrix

    7. Ax = b where matrix and matrix

  2. Which of the matrices in problem 1 are invertible?

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Updated: September 6, 2000

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