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Math Help - Simultaneous equations

  1. #1
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    Smile Simultaneous equations

    for what value of a will simultaneos equations of the form

    6x+3y+az=b
    5x+4y+2z=c
    7x+2y+3z=d

    fail to possess a unique solution?



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  2. #2
    Super Member Rebesques's Avatar
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    Consider the matrix of coefficients and set its determinant equal to 0. This gives only one value for a.
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