Precalculus Practice Exam

Part 4 Test 5 Time: 1 hour

Matrix Algebra is no longer included in Math 4109.

  1. Solve the following system of equations:

    eqnarray11

    Answer: x=3,y=-1,z=2.

  2. Find the determinant of

    displaymath91


    Answer: The determinant is -28.

  3. Find the inverse of the matrix

    displaymath92


    Answer: The inverse equals

    displaymath93

  4. If tex2html_wrap_inline103 , and tex2html_wrap_inline105 find the following:

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Thu Jul 3 16:35:57 MDT 1997

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