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18 April, 12:28

According to the rational root theorem - 7/8 is a potential rational root of which function.

A. f (x) = 24x^7+3x^6+4x^3-x-28

B. f (x) = 28x^7+3x^6+4x^3-x-24

C. f (x) = 30x^7+3x^6+4x^3-x-56

D. f (x) = 56x^7+3x^6+4x^3-x-30

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  1. 18 April, 15:15
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    Possible roots are p/q where p is a factor of the last number and q is a factor of the coefficient of the term of highest degree.

    so since - 7 is a factor of - 28 and 8 is a factor of 24 its choice A.
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