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    I need a point in the right direction on this one, as I'm absolutely stumped. Any ideas?

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    (Original post by thomoski2)
    I need a point in the right direction on this one, as I'm absolutely stumped. Any ideas?

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    Here's a starter. The system of equations will have infinitely many solutions if any of the three equations is a multiple of either of the other two equations. Perhaps have a look at the first and third equations?
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    (Original post by old_engineer)
    Here's a starter. The system of equations will have infinitely many solutions if any of the three equations is a multiple of either of the other two equations. Perhaps have a look at the first and third equations?
    I've given that a try, but I'm still stumped
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    (Original post by thomoski2)
    I've given that a try, but I'm still stumped
    I've got as far as row reducing, and then solving using cases, but I'm not sure how to row reduce it
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    Have you tried to find the determinant of non-augmented matrix first of all?
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    (Original post by thomoski2)
    I've given that a try, but I'm still stumped
    Are there values of a and b for which the third equation is a multiple of the first equation? (Quite a simple integer multiple).
 
 
 
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