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Homework Help: Is there a typo in x_1 for the particular solution in this answer?

  1. Mar 25, 2017 #1


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    1. The problem statement, all variables and given/known data
    In question #1(b)'s answer, should x_1 = 4 (instead of -4)?

    2. Relevant equations
    PDF of problem #1(b):

    Reduced row echelon form of the matrix I obtained from the given equations (in problem #1):

    3. The attempt at a solution
    If t = 0, then it should be the case that x_3 = 1 + 2*0 = 0, x_2 = 0 and that x_1 = 4 + 0 = 4 ≠ -4.

    Am I right and the answer is wrong?
  2. jcsd
  3. Mar 25, 2017 #2


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    Staff Emeritus
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    That is surely a typo.

    If t=0, then x1 = 4 .
  4. Mar 26, 2017 #3


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    Great, so it's not just me. Thanks. :)
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