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     EduGorilla 
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    The values of a and b for which the following system of linear equations has an infinite number of solutions, are

    ax + y + 3z = a
    2x + by – z = 3
    5x + 7y + z = 7

    Options :-

    1. a = 1, b = 1
    2. a = 1, b = 3
    3. a = 2, b = 3
    4. a = 2, b = 1
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