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     EduGorilla 
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    If A is a square matrix of order n such that its elements are polynomial in x and its r-rows become identical for x = k, then

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    1. (x - k)r is a factor of |A|
    2. (x - k)r - 1 is a factor of |A|
    3. (x - k)r + 1 is a factor of |A|
    4. (x - k)r is a factor of A
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